Rescuers still to find plane’s flight data recorder, leading to growing calls for caution in blaming co-pilot Andreas Lubitz for deliberately downing the aircraft 
 
 Forensic teams have identified 78 distinct DNA strands from body parts spread across the remote mountainside in the French Alps where Germanwings flight 4U9525 crashed, killing all 150 people on board. 
 
 Rescuers are still, however, to locate the plane’s second black box — its flight data recorder — six days after the Barcelona to Düsseldorf flight crashed into a rocky ravine at 435 miles (700km) per hour. 
 
 Between 400 and 600 body parts have been located and are currently being examined. 
 
 “We haven’t found a single body intact,” said Patrick Touron, the deputy director of the police’s criminal research institute. Identification experts were using dental records, DNA samples from family members, fingerprints, jewellery and bits of ID card to help the process. 
 
 The black box, which is actually orange and weighs around 10kg, was originally in a protective casing, but only the empty casing has been found. 
 
 Captain Yves Naffrechoux, a mountain ranger, told Agence France-Presse: “If it has not been completely destroyed or pulverised, the black box will be under the rubble and debris. We must work with caution and a lot of precision. We have to look under every last bit of plane and lift every rock.” 
 
 An access road was being built to the site to allow all-terrain vehicles to remove some of the larger parts of the plane. 
 
 Prosecutors in France and Germany have suggested that the co-pilot, Andreas Lubitz, deliberately crashed the plane. They have retrieved a torn-up sicknote from his flat in Düsseldorf, which was dated for the day of the disaster. Lubitz, who is from the small German town of Montabaur, had a history of depression which he hid from his employer and colleagues, they said. 
 
 
 
 The suicide-mass murder theory is based on the cockpit voice recorder retrieved from the crash site near the village of Le Vernet. According to Germany’s Bild am Sonntag newspaper, the captain, Patrick Sondheimer, asked Lubitz to prepare the plane to land in Düsseldorf. Lubitz responded “laconically”. Sondheimer then left the cockpit to go to the toilet, telling his co-pilot: “You can take over.” 
 
 
 
 There was a sound of a seat being pushed back, and the door clicking shut. According to Bild, the plane then went into a steady descent. Minutes later there is a loud knocking and the voice of the captain saying: “For God’s sake open the door.” In the final moments the screams of passengers can be heard. 
 
 
 
 German and European pilots’ associations urged caution last week in stating the cause of the crash until the second black box was discovered and the air accident investigation brought to a conclusion. 
 
 
 
 Jean-Pierre Michel, the head of the French investigation agency, said that some technical details of what precisely happened to the Airbus A320 aircraft were still missing. “At the moment we can’t rule out the hypothesis of a technical fault,” Michel told the French channel BFM TV. 
 
 The German chief executive of the Airbus Group, Tom Enders, expressed his irritation on Sunday and criticised TV talkshow coverage of the disaster. “There has been speculation without facts, fantasy and lies,” Enders said. Such “outrageous nonsense” mocked the victims, he added. 
 
 
 
 In Montabaur, where Lubitz lived part of the time with his father, mother and younger brother, prayers were said on Sunday for the victims of the crash, and for the co-pilot and his grieving family. Hundreds of worshippers packed into St Peter’s Catholic church on the town’s cobbled main street, on a morning of pouring rain. 
 
 
 
 Many there believed that investigators had been too quick to blame Lubitz for the disaster. Candles and flowers have been left outside the church, and one note read: “We think of all victims of this tragic crash, and their families and friends, in these difficult hours.” 
 
 The priest expressed sympathy for Lubitz’s parents whom, he said, had found themselves “at the centre of attention”, the families and friends of the victims, and the rescue workers in France. ||||| (CNN) The sounds recorded on one of the "black boxes" recovered from downed Germanwings Flight 9525 firms up investigators' theory that the co-pilot locked the captain out of the cockpit and then crashed the plane. 
 
 "For God's sake, open the door!" Capt. Patrick Sondenheimer screamed as he banged on the cockpit door, pleading with the co-pilot. 
 
 Thirteen minutes later, the plane slammed into the French Alps. 
 
 The audio from the plane's cockpit voice recorder has not been released, but the German newspaper Bild published Sunday what it claims is a summary of the transcript from the recording. 
 
 France's accident investigation agency, BEA, told CNN that the agency is "dismayed" by the voice recording leak to Bild. 
 
 Martine Del Bono, a spokeswoman for the agency, said the leak could not have come from a BEA agent. She said the agency considers the report mere "voyeurism." 
 
 According to Bild's report, Sondenheimer told co-pilot Andreas Lubitz that he didn't manage to go to the bathroom before takeoff. Lubitz tells him he can go anytime. 
 
 Lubitz is believed to have locked the pilot of Flight 9525 out of the cockpit before putting the plane on a rapid descent into the mountains, French authorities have said. 
 
 The flight took off 20 minutes late. After reaching cruising altitude, Sondenheimer asked Lubitz to prepare the landing. 
 
 Once that's finished, Lubitz again tells the captain he "can go anytime." 
 
 There is the sound of a seat being pushed backward after which the captain says, "You can take over." 
 
 At 10:29 a.m., air traffic radar detects that the plane is starting to descend. 
 
 Three minutes later, air traffic controllers try to contact the plane and receive no answer -- shortly after which an alarm goes off in the cockpit, warning of the "sink rate," Bild reported. 
 
 Next comes the banging. 
 
 Sondenheimer begs Lubitz to let him in. Passengers then begin to scream, according to the transcript obtained by Bild. 
 
 Another three minutes pass. A loud metallic bang is heard at 7,000 meters (almost 23,000 feet). 
 
 A minute and half later and 2,000 meters (about 6,500 feet) lower to the ground, an alarm says "Terrain -- pull up!" 
 
 "Open the damn door!" the pilot says. 
 
 It's 10:38, and the plane is at 4,000 meters (about 13,000 feet). Lubitz's breathing can still be heard on the voice recorder, according to Bild's report. 
 
 Two minutes later, investigators think they hear the plane's right wing scrape a mountaintop. 
 
 Screams can be heard one final time. 
 
 'Unbelievable' leak 
 
 Cockpit recordings are some of the most sensitive and closely held parts of aviation crash investigations. They're never officially released, according to CNN aviation reporter Richard Quest. 
 
 Quest called it "unbelievable" that the black box audio would be leaked in this manner. 
 
 Communications between air traffic control and a plane's cockpit can be downloaded privately, but that's less common in Europe than it is in the United States. 
 
 An edited and redacted version of the transcript is usually published in part of a final report on an incident. 
 
 Although search teams have recovered the cockpit voice recorder, the flight data recorder remains missing. That device could reveal crucial details about what happened during the final moments of the flight. 
 
 What authorities know 
 
 Jean Pierre Michel, lead investigator for the French inquiry, said on Saturday that investigators are not ruling out any scenario with respect to the crash out at this point. 
 
 But French authorities have said that Lubitz appeared to have crashed Germanwings Flight 9525 deliberately into the Alps on Tuesday as it flew from Barcelona, Spain, toward Dusseldorf, Germany, with 150 people on board. 
 
 Much attention has focused on Lubitz's state of mind since then, with suggestions that he may have had mental health issues. 
 
 Lubitz, 27, passed his annual pilot recertification medical examination in summer 2014, a German aviation source told CNN. 
 
 An official with Lufthansa, which owns Germanwings, said that the exam only tests physical health, not psychological health. 
 
 JUST WATCHED Police search Germanwings co-pilot's home for clues Replay More Videos ... MUST WATCH Police search Germanwings co-pilot's home for clues 00:10 
 
 The official also said that the company was never given any indication Lubitz was depressed, and that if he went to a doctor on his own, he would have been required to self-report if deemed unfit to fly. 
 
 A Dusseldorf clinic said he'd gone there twice, most recently on March 10, "concerning a diagnosis." But the University Clinic said it had not treated Lubitz for depression. 
 
 The speculation about Lubitz' mental state is based on a letter found in a waste bin in his Dusseldorf apartment. 
 
 The note, which was "slashed," said Lubitz was not able to do his job, city prosecutor Christoph Kumpa said Friday. 
 
 The fact that investigators found "ripped, recent medical leave notes, including for the day of the offense, leads to the preliminary conclusion that the deceased kept his illness secret from his employer and his professional environment," prosecutors said. 
 
 Germanwings corroborated that assertion, saying it had never received a sick note from Lubitz. 
 
 Anxiety, burnout and depression 
 
 A handful of publications, citing unnamed sources, have reported that Lubitz suffered from various psychological maladies. 
 
 CNN has not been able to confirm these reports. 
 
 Lubitz suffered from "generalized anxiety disorder," and from severe depression in the past, Le Parisien newspaper reported Sunday, citing sources close to the investigation. In 2010, Lubitz received injections of antipsychotic medication, the paper said. 
 
 He was also prescribed a medication that influences neurotransmitters, but it's unclear when that happened, according to Le Parisien. 
 
 The newspaper said investigators found a handful of pills in his apartment in addition to two sick notes, which forbade him from working from March 16 to March 29. 
 
 The New York Times and The Wall Street Journal, citing unnamed sources, reported Friday that Lubitz suffered from mental illness and kept his diagnosis concealed from his employer. 
 
 A subsequent report from the Times on Saturday, citing two officials with knowledge of the investigation, said Lubitz sought treatment before the crash for vision problems that might have put his career at risk. However, an official with Lufthansa, said that if Lubitz had vision problems, they would have been discovered during his pilot recertification medical examination. 
 
 Authorities have not ruled out the vision problems could have been psychosomatic, according to the Times. 
 
 Citing an unidentified senior investigator, German newspaper Die Welt said that Lubitz suffered from a severe "psychosomatic illness" and that German police seized prescription drugs that treat the condition. Lubitz suffered from a "severe subjective burnout syndrome" and from severe depression, the source told the newspaper. 
 
 News reports also stated that antidepressants were found during the search of his apartment. 
 
 Investigators are expected to question his relatives, friends and co-workers as they try to pin down what could have prompted the co-pilot to steer a jetliner full of people into a mountainside. 
 
 Lubitz had a girlfriend, a teacher at a school in Dusseldorf not far from his apartment, according to German media. 
 
 'This is a man whose life is totally broken' 
 
 Dozens of people attended a remembrance ceremony Saturday for the victims of the crash at a church in a nearby town, Digne-les-Bains, France. Most of the people on the plane were from Germany and Spain. 
 
 Relatives of the victims and local residents also gathered Saturday afternoon by a simple stone memorial set up near the crash site, in the village of Le Vernet. Flowers have been laid there, in the shadow of the snow-covered peaks of the French Alps. 
 
 The mayor of one local community said he had seen Lubitz's father on Thursday evening, describing him as "a man in deep distress." 
 
 "We get the impression that that man is bearing the whole weight of the disaster on his shoulders," Bernard Bartolini, the mayor of Prads-Haute-Bleone, said Saturday. 
 
 "I can tell that this is a man whose life is totally broken," Bartolini said. "He had so much emotion in him." ||||| (CNN) German investigators found antidepressants in the apartment of Germanwings co-pilot Andreas Lubitz this week, according to published reports. 
 
 Die Welt, a German newspaper, cited an unidentified senior investigator who said Lubitz suffered from a severe "psychosomatic illness" and German police seized prescription drugs that treat the condition. Lubitz suffered from a "severe subjective burnout syndrome" and from severe depression, the source told Die Welt. 
 
 The New York Times also reported that antidepressants were found during the search of his apartment. CNN has not been able to confirm the reports. 
 
 Investigators continued to work Saturday to piece together the secret life of Lubitz, who officials say was hiding an illness from his employers. He had been declared "unfit to work" by a doctor. 
 
 They were expected to question his relatives, friends and co-workers as they try to pin down what could have prompted the seemingly competent and stable co-pilot to steer a jetliner into a mountainside on Tuesday. 
 
 As their efforts continued, dozens of people attended a remembrance ceremony for the victims of the crash at a church in a nearby town, Digne-les-Bains. There were 150 people on board Germanwings Flight 9525, including Lubitz. 
 
 Relatives of the victims and local residents also gathered Saturday afternoon by a simple stone memorial set up near the crash site, in the village of Le Vernet. Flowers have been laid there, in the shadow of the snow-covered peaks of the French Alps. 
 
 JUST WATCHED Police search Germanwings co-pilot's home for clues Replay More Videos ... MUST WATCH Police search Germanwings co-pilot's home for clues 00:10 
 
 Mental health speculation 
 
 Much attention has focused on Lubitz's state of mind, with some media reports speculating that he may have had mental health issues. 
 
 Investigators found a letter in the waste bin of his Dusseldorf, Germany, apartment saying that Lubitz, 27, wasn't fit to do his job, city prosecutor Christoph Kumpa said Friday. The note, Kumpa said, had been "slashed." 
 
 Just what was ailing Lubitz hasn't been revealed. The New York Times and the Wall Street Journal, citing unnamed sources, reported Friday that Lubitz suffered from mental illness and kept his diagnosis concealed from his employer. 
 
 A subsequent New York Times report on Saturday, citing two officials with knowledge of the investigation, said Lubitz sought treatment before the crash for vision problems that might have put his career at risk. According to those unnamed officials, Lubitz also was being treated for psychological issues. Other media reports indicate he was treated for depression. 
 
 Lubitz passed his annual pilot recertification medical examination in summer 2014, a German aviation source told CNN. 
 
 An official with Lufthansa, which owns Germanwings, said the exam only tests physical health, not psychological health, and that if Lubitz had vision problems that would have been discovered during the tests. 
 
 "We can't believe it. If anything was wrong with his eyes during the physical exam we would have known," the official says. 
 
 The Lufthansa official also said the company was never given any indication Lubitz was depressed, and that if he went to a doctor on his own he would have been required to self-report if he had been deemed unfit to fly. 
 
 A Dusseldorf clinic said he'd gone there twice, most recently on March 10, "concerning a diagnosis." But the University Clinic said it had not treated Lubitz for depression. 
 
 German investigators said they still have interviews and other work to do before they can reveal what they gleaned from the records found in the apartment and at his parents' home in the town of Montabaur. 
 
 JUST WATCHED Prosecutor: Co-pilot hid 'illness' from airline Replay More Videos ... MUST WATCH Prosecutor: Co-pilot hid 'illness' from airline 02:40 
 
 But the fact that investigators found "ripped, recent medical leave notes, including for the day of the offense, leads to the preliminary conclusion that the deceased kept his illness secret from his employer and his professional environment," prosecutors said. 
 
 Germanwings corroborated that assertion, saying it had never received a sick note from Lubitz. 
 
 Authorities left Lubitz's apartment Friday night with boxes of papers and evidence folders after spending about 90 minutes inside. 
 
 Investigators exchange information 
 
 Dusseldorf police said Saturday that a small team of French investigators had arrived in the city and that they were sharing information. 
 
 Jean Pierre Michel, lead investigator for the French inquiry, told French TV from Dusseldorf that the French team would work in "full transparency" with their German counterparts. 
 
 "We will interview people related to the investigation in the coming days. The hearings will be conducted in the coming days and weeks," he said, according to CNN's French affiliate BFMTV. 
 
 Asked by a journalist about reports of Lubitz's possible mental illness, he replied: "The elements of the investigation are strictly confidential and we cannot address these matters today." 
 
 No scenario can yet be ruled out, including mechanical failure, "as we do not have the necessary evidence," he said. 
 
 The German tabloid newspaper Bild said Saturday it had interviewed an ex-girlfriend of Lubitz. The woman is not named in the story and CNN has not been able to verify the report independently. 
 
 According to Bild, the ex-girlfriend said Lubitz was a very nice and sensitive man who needed a lot of care and attention, and he was very troubled. She said he would get into fights with her. 
 
 The newspaper also cited the ex-girlfriend as saying that Lubitz had bad dreams that his plane was going down. 
 
 Relative names flight captain 
 
 Patrick Sondenheimer was the pilot of Germanwings Flight 9525, according to Reiner Sondenheimer of Dusseldorf, Germany, who says he is a relative of Patrick's. 
 
 Patrick Sondenheimer is the pilot believed to have been locked out of the cockpit by his co-pilot, Lubitz. 
 
 JUST WATCHED Germanwings pilot identified Replay More Videos ... MUST WATCH Germanwings pilot identified 01:38 
 
 CNN spoke to Reiner Sondenheimer at his Dusseldorf apartment. Also at the apartment was a woman who did not provide her name but said she was Patrick Sodenheimer's relative. That woman also said that Patrick Sondenheimer was on the doomed flight. 
 
 Reiner Sondenheimer declined to say anything else, other than the family wanted time to grieve. 
 
 The pilot has not been named by German authorities. 
 
 Another Germanwings pilot who once flew with Lubitz, Frank Woiton, told WDR, a local broadcaster belonging to CNN's German affiliate ARD, that his impression of Lubitz was that he was "friendly" and that there was "nothing suspicious." 
 
 Woiton also said Lubitz "was a good pilot and had a good command of the plane." 
 
 Woiton's first job after he found out about the crash was the route Dusseldorf-Barcelona-Dusseldorf -- the same route as had been taken by Germanwings Flight 9525 a day earlier. 
 
 He was praised in German media for the emotional announcement he made to passengers before takeoff, in which he said the crew, like everyone else on the plane, wanted to get home safely to their families. 
 
 Perilous recovery operation 
 
 At the scene of the crash, two helicopters were being deployed above the mountainside by recovery crews Saturday. The weather has improved after high winds Friday made their complex task even more treacherous 
 
 Lt. Col. Xavier Vialenc, a spokesman for the Gendarmerie, told CNN there were about 40 officers at the crash site Saturday. 
 
 Once at the crash site, recovery workers spend all day working there, he said. Back in Seyne-les-Alpes at the end of the day, they can see a psychologist if they choose and have a debriefing session with all the workers. 
 
 Vialenc said the operations were going well so far and that the progress made was meeting their expectations. 
 
 Yves Naffrechoux, captain of rescue operations at Seyne-les-Alpes, told CNN on Friday that rescuers have found bodies at the rugged crash site, but few of them are intact. 
 
 JUST WATCHED Investigators: Recovery effort going 'bit by bit' Replay More Videos ... MUST WATCH Investigators: Recovery effort going 'bit by bit' 02:10 
 
 It could be weeks before all the bodies are recovered, identified and released to the families, authorities said. 
 
 The mountainous terrain where the Germanwings jet went down is difficult to access. 
 
 Airline: Lubitz passed initial tests 
 
 What could have prompted Lubitz to deliberately destroy the aircraft, killing everyone on board, remains the focus of investigators in Germany. 
 
 JUST WATCHED Lufthansa CEO: Speechless that co-pilot crashed plane Replay More Videos ... MUST WATCH Lufthansa CEO: Speechless that co-pilot crashed plane 01:08 
 
 He had passed medical and psychological testing when he was hired in 2013, said Carsten Spohr , CEO of Lufthansa, which owns Germanwings. 
 
 Spohr also told reporters that Lubitz had "interrupted" his pilot training, which he began in 2008. That break lasted several months, he said, but added that such an interruption isn't uncommon. Spohr didn't give a reason for the break. 
 
 While the ailment Lubitz had sought treatment for hasn't been revealed, that he was declared unfit for work is an important detail, aviation analysts say. Pilots are required to maintain their fitness to fly and must tell their airline if they're found unfit, CNN aviation analyst David Soucie said. 
 
 Although authorities have recovered the cockpit voice recorder, the flight data recorder remains missing. It could shed crucial details about what happened inside the cockpit, authorities say. 
 
 Banging and screaming 
 
 Lubitz was the co-pilot on Tuesday's flight between Barcelona, Spain, and Dusseldorf when he apparently locked the captain out of the cockpit, then activated a control causing the plane to descend toward rugged terrain. 
 
 Germanwings said the plane dropped for about eight minutes from its cruising altitude of 38,000 feet before crashing. 
 
 The only sounds , authorities said, were those of pounding on the cockpit door, Lubitz's steady breathing and, eventually, screaming passengers. 
 
 Lubitz and 149 other people on board the plane died in an instant, authorities say. Most were from Germany and Spain. ||||| MONTABAUR, Germany (AP) — The pastor of the Lutheran church in Andreas Lubitz's hometown said Sunday that the community stands by him and his family, despite the fact that prosecutors blame the 27-year-old co-pilot for causing the plane crash that killed 150 people in southern France. 
 
 Buses of the French gendarmerie, park and mask the homage ceremony with family members of Japanese victims in the area where the Germanwings jetliner crashed in the French Alps, in Le Vernet, France,... (Associated Press) 
 
 Pope Francis delivers his blessing at the end of a Palm Sunday Mass in St. Peter's Square, at the Vatican, Sunday, March 29, 2015. Pope Francis has walked solemnly through St. Peter's Square in a Palm... (Associated Press) 
 
 The German, left, and Japanese flags are deployed during an homage ceremony with family members of Japanese victims in front of a stele, a stone slab erected as a monument, set up in memory of the victims... (Associated Press) 
 
 The German, left, and Japanese flags are deployed during an homage ceremony with family members of Japanese victims in the area where the Germanwings jetliner crashed in the French Alps, in Le Vernet,... (Associated Press) 
 
 In this still image photo taken from video, people leave the protestant Luther church in the hometown of co-pilot Andeas Lubitz, in Montabaur, Germany, Sunday, March 29, 2015. A church service was held... (Associated Press) 
 
 In this still image photo taken from video, Priest Michael Dietrich, from the hometown of co-pilot Andeas Lubitz talks during an interview with AP Television, in Montabaur, Germany, Sunday, March 29,... (Associated Press) 
 
 The town of Montabaur has been rattled by the revelation that Lubitz, who first learned to fly at a nearby glider club, may have intentionally caused Tuesday's crash of Germanwings Flight 9525. 
 
 "For us, it makes it particularly difficult that the only victim from Montabaur is suspected to have caused this tragedy, this crash — although this has not been finally confirmed, but a lot is indicating that — and we have to face this," pastor Michael Dietrich said. 
 
 He spoke to The Associated Press after holding a church service Sunday to commemorate the crash victims and support their families. 
 
 "The co-pilot, the family belong to our community, and we stand by this, and we embrace them and will not hide this, and want to support the family in particular," Dietrich said. 
 
 He added that there is no direct contact with the family at the moment, but that he believes they are receiving good assistance. 
 
 French prosecutors haven't questioned the family yet "out of decency and respect for their pain," Marseille prosecutor Brice Robin said. 
 
 Authorities are trying to understand what made Lubitz lock his fellow pilot out of the cockpit and ignore his pleas to open the door before slamming the plane into a mountain on what should have been a routine flight from Barcelona to Duesseldorf. 
 
 French officials refused to confirm or deny a partial transcript that German newspaper Bild am Sontag said it had obtained of the cockpit recording. The paper reported Sunday that the pilot left for the toilet shortly before 10:30 a.m. and was heard trying unsuccessfully to get into the cockpit again a few minutes later, then shouting "for God's sake open the door." 
 
 After several more minutes in which the pilot could be heard trying to break open the door, the plane crashed into the mountainside, according to Bild am Sonntag, which didn't say how it obtained the report. 
 
 Brice, the Marseille prosecutor said that none of the bodies recovered so far have been identified, denying German media reports that Lubitz's body had been found. 
 
 Tests on the body of the co-pilot may provide clues on any medical treatment he was receiving. Germany prosecutors said Friday that Lubitz was hiding an illness and sick notes for the day of the crash from his employer. 
 
 Dietrich, the pastor, said he knew Lubitz as a teenager, when he attended religious education 13 years ago, and his mother, who worked as a part-time organist in the community. 
 
 "When I worked with her or talked to her, it was very good and very harmonious. We had good conversations," Dietrich said. "I know her and her family. This does not make sense. It is incomprehensible for me, for us, for everyone who knew her and the family." 
 
 "From what I've heard, there were no obvious signs that there is anything in the background that could lead to this," he added. 
 
 In Rome, Pope Francis on Sunday prayed for the victims of the plane crash, citing in particular the 16 German students returning from an exchange trip to Spain. 
 
 Francis offered the prayer after Palm Sunday Mass in St. Peter's Square at the start of Holy Week. 
 
 In Le Vernet, a town near the crash site, families and friends of those killed were still coming to terms with what had happened. 
 
 "Members of the family shed tears as they went to see the site," said Ippei Yamanaka, co-worker of Japanese passenger Junichi Sato who died in the crash. "It was particularly moving to see Mr. Sato's father asking the leader of the Kempeitai (a Japanese military rescue team), with many tears in his eyes, for them to continue the search operation and for it to finish earlier even by just one day." 
 
 "His wife says she still she cannot believe what has happened, saying that it almost feels like her husband is away on his business trip and that it still feels like he is going to return soon," Yamanaka said. 
 
 ___ 
 
 Frank Jordans in Berlin, Philippe Sotto in Paris and Frances D'Emilio in Rome, contributed to this report. ||||| Dusseldorf, Germany (CNN) Years before he was at the controls of a Germanwings plane that plunged into the French Alps, Andreas Lubitz told the airline he worked for that he'd had a bout with depression. 
 
 Lubitz, the co-pilot of Germanwings Flight 9525 who authorities accuse of deliberately crashing the plane, told his Lufthansa flight training school in 2009 that he had a "previous episode of severe depression," the airline said Tuesday. 
 
 Email correspondence between Lubitz and the school discovered in an internal investigation, Lufthansa said, included medical documents he submitted in connection with resuming his flight training. 
 
 The announcement indicates that Lufthansa, the parent company of Germanwings, knew of Lubitz's battle with depression, allowed him to continue training and ultimately put him in the cockpit. 
 
 Lufthansa, whose CEO previously said Lubitz was 100% fit to fly, described its statement Tuesday as a "swift and seamless clarification" and said it was sharing the information and documents -- including training and medical records -- with public prosecutors. 
 
 It's a development that will likely be a part of the crash investigation, but it's only one piece of the puzzle, CNN aviation correspondent Richard Quest said. 
 
 "We need to know what happened after he returned in 2009 and finished his training, because that tells us whether there was the correct procedure and process," he said. 
 
 A Lufthansa spokesperson told CNN on Tuesday that Lubitz had a valid medical certificate, had passed all his examinations and "held all the licenses required." 
 
 JUST WATCHED Prosecutors: Co-pilot suicidal at one time Replay More Videos ... MUST WATCH Prosecutors: Co-pilot suicidal at one time 00:10 
 
 Possible motive: Fear of losing license 
 
 The details about Lubitz's correspondence with the flight school during his training were among several developments as investigators continued to delve into what caused the crash and Lubitz's possible motive for downing the jet. 
 
 Earlier, a spokesman for the prosecutor's office in Dusseldorf said Lubitz suffered from suicidal tendencies at some point before his aviation career. 
 
 Medical records reveal that Lubitz was suicidal at one time and underwent psychotherapy before he got his pilot's license, prosecutor's spokesman Christoph Kumpa said. 
 
 Kumpa emphasized there's no evidence suggesting Lubitz was suicidal or acting aggressively before the crash. 
 
 Investigators are looking into whether Lubitz feared his medical condition would cause him to lose his pilot's license, a European government official briefed on the investigation into last week's crash told CNN on Tuesday. 
 
 While flying was "a big part of his life," the source said, it's only one theory being considered. 
 
 Another source, a law enforcement official briefed on the investigation, also told CNN that authorities believe the primary motive for Lubitz to bring down the plane was that he feared he would not be allowed to fly because of his medical problems. 
 
 Lubitz's girlfriend told investigators he had seen an eye doctor and a neuropsychologist, both of whom deemed him unfit to work recently and concluded he had psychological issues, the European government official said. 
 
 Lubitz told the neuropsychologist that he was too stressed with work, the official said. 
 
 But no matter what details emerge about his previous mental health struggles, there's more to the story, said Brian Russell, a forensic psychologist. 
 
 "Psychology can explain why somebody would turn rage inward on themselves about the fact that maybe they weren't going to keep doing their job and they're upset about that and so they're suicidal," he said. "But there is no mental illness that explains why somebody then feels entitled to also take that rage and turn it outward on 149 other people who had nothing to do with the person's problems." 
 
 Video of flight's final seconds? 
 
 Reports say a cell phone video shows the nightmarish final seconds of Germanwings Flight 9525, but a police spokesman said the accounts were "completely wrong." 
 
 French magazine Paris Match and German newspaper Bild reported that a video recovered from a phone at the wreckage site showed the inside of the plane moments before it crashed. 
 
 "One can hear cries of 'My God' in several languages," Paris Match reported . "Metallic banging can also be heard more than three times, perhaps of the pilot trying to open the cockpit door with a heavy object. Towards the end, after a heavy shake, stronger than the others, the screaming intensifies. Then nothing." 
 
 The two publications described the video, but did not post it on their websites. The publications reported that they watched the video, which was found by a source close to the investigation. 
 
 "It is a very disturbing scene," said Julian Reichelt, editor-in-chief of Bild online. 
 
 An official with France's accident investigation agency, the BEA, said the agency is not aware of any such video. 
 
 Lt. Col. Jean-Marc Menichini, a French Gendarmerie spokesman in charge of communications on rescue efforts around the Germanwings crash site, told CNN that the reports were "completely wrong" and "unwarranted." Cell phones have been collected at the site, he said, but that they "hadn't been exploited yet." 
 
 Menichini said he believed the cell phones would need to be sent to the Criminal Research Institute in Rosny sous-Bois, near Paris, in order to be analyzed by specialized technicians working hand-in-hand with investigators. But none of the cell phones found so far have been sent to the institute, Menichini said. 
 
 Asked whether staff involved in the search could have leaked a memory card to the media, Menichini answered with a categorical "no." 
 
 Reichelt told "Erin Burnett: Outfront" that he had watched the video and stood by the report, saying Bild and Paris Match are "very confident" that the clip is real. 
 
 He noted that investigators only revealed they'd recovered cell phones from the crash site after Bild and Paris Match published their reports. 
 
 "That is something we did not know before. ... Overall we can say many things of the investigation weren't revealed by the investigation at the beginning," he said. 
 
 Recovery efforts continue 
 
 While investigators search for clues to Lubitz's motivation, recovery workers continue the grim task of searching for the remains of those killed in the March 24 crash. 
 
 The remains of at least 78 people on board the plane have been identified so far using DNA analysis. 
 
 Naffrechoux warned Monday that "it may not be possible to find the human remains of all the 150 passengers, as some of them may have been pulverized by the crash." 
 
 But French President Francois Hollande, speaking alongside German Chancellor Angela Merkel in Berlin, was more positive, saying that it should be possible to identify all the victims by the end of the week. 
 
 Photos: Germanwings plane crashes in France Photos: Germanwings plane crashes in France A recovery crew works among debris of Germanwings Flight 9525 at the crash site near Seyne-les-Alpes, France, on Friday, April 3. The crash killed all 150 people aboard and has raised questions about the co-pilot's mental state. Hide Caption 1 of 26 Photos: Germanwings plane crashes in France French Gen. David Galtier holds up a picture of the second black box from Germanwings 9525 during a news conference in Marseille, France, on Thursday, April 2. The flight data recorder shows that co-pilot Andreas Lubitz purposely used the controls to speed up the plane's descent, investigators said. Hide Caption 2 of 26 Photos: Germanwings plane crashes in France Rescue workers recover debris from the crash site in the French Alps on Tuesday, March 31. Flight 9525 was traveling from Barcelona, Spain, to Dusseldorf, Germany, when it crashed. Hide Caption 3 of 26 Photos: Germanwings plane crashes in France A helicopter drops rescue workers next to crash debris near Seyne-les-Alpes, France, on Sunday, March 29. Hide Caption 4 of 26 Photos: Germanwings plane crashes in France Forensic experts work near the crash site on Thursday, March 26. Hide Caption 5 of 26 Photos: Germanwings plane crashes in France Journalists stand in front of the Westerwald airfield in Montabaur, Germany, on March 27. Lubitz reportedly learned to fly here. Hide Caption 6 of 26 Photos: Germanwings plane crashes in France Investigators carry a computer from the home of Lubitz's parents in Montabaur, Germany, on Thursday, March 26. Hide Caption 7 of 26 Photos: Germanwings plane crashes in France A police officer stands guard March 26 at an apartment building where Lubitz was thought to have lived in Dusseldorf. Hide Caption 8 of 26 Photos: Germanwings plane crashes in France A helicopter lifts a rescue worker from the crash site on March 26. Hide Caption 9 of 26 Photos: Germanwings plane crashes in France Rescue workers continue to search the site of the crash on March 26. Hide Caption 10 of 26 Photos: Germanwings plane crashes in France Search-and-rescue teams land near the crash site on Wednesday, March 25. Hide Caption 11 of 26 Photos: Germanwings plane crashes in France Debris from the plane is seen along a mountainside on March 25. Hide Caption 12 of 26 Photos: Germanwings plane crashes in France French military personnel move up a mountainside March 25 near Seyne-les-Alpes. Hide Caption 13 of 26 Photos: Germanwings plane crashes in France The cockpit voice recorder of the Germanwings jet appears in this photo provided by the French air accident investigation bureau on March 25. The device is designed to capture all sounds on a plane's flight deck. Hide Caption 14 of 26 Photos: Germanwings plane crashes in France A helicopter comes in to land near Seyne-les-Alpes, the staging ground for search efforts, on March 25. Hide Caption 15 of 26 Photos: Germanwings plane crashes in France Rescue workers and members of the French Gendarmerie gather in Seyne-les-Alpes on Tuesday, March 24, as search-and-rescue teams struggle to reach the remote crash. Hide Caption 16 of 26 Photos: Germanwings plane crashes in France Wreckage is seen at the crash site on March 24. Hide Caption 17 of 26 Photos: Germanwings plane crashes in France Response teams gather in Seyne-les-Alpes on March 24. Hide Caption 18 of 26 Photos: Germanwings plane crashes in France Relatives of the flight's passengers arrive at the airport in Barcelona on March 24. Hide Caption 19 of 26 Photos: Germanwings plane crashes in France People hold hands walking through the Dusseldorf Airport on March 24. Hide Caption 20 of 26 Photos: Germanwings plane crashes in France The arrivals board at the Dusseldorf Airport shows Germanwings Flight 9525 without a status on March 24. Hide Caption 21 of 26 Photos: Germanwings plane crashes in France People arrive at the Dusseldorf Airport on March 24. Hide Caption 22 of 26 Photos: Germanwings plane crashes in France An employee of Swissport, the handling agent of Germanwings flights from Barcelona, speaks by phone at the Barcelona-El Prat Airport on March 24. Hide Caption 23 of 26 Photos: Germanwings plane crashes in France Relatives of people involved in the crash arrive at the Barcelona airport on March 24. Hide Caption 24 of 26 Photos: Germanwings plane crashes in France A man in Madrid looks at a monitor with a map, released from the Flightradar24 website, showing the point where the plane's radar signal went missing. Hide Caption 25 of 26 Photos: Germanwings plane crashes in France This undated file photo shows the Germanwings Airbus A320 that crashed. Germanwings is a low-cost airline owned by the Lufthansa Group. Hide Caption 26 of 26 
 
 A simple stone memorial has been set up at Le Vernet, where grieving relatives of those killed have laid flowers and held prayers. 
 
 Safety investigation 
 
 The BEA, France's accident investigation agency, said its ongoing safety investigation was focusing on a more detailed analysis of the flight history leading up to the crash, based on the audio recovered from the cockpit voice recorder and any other available data. 
 
 "A deliberate act by a man with a disturbed psychological profile is a possible scenario," BEA spokeswoman Martine Del Bono told CNN. "The first step of the investigation is to describe more precisely what happened." 
 
 This will be based mainly on analysis of the cockpit voice recorder, to be supplemented by data from the flight data recorder if it is found, she said. 
 
 "But we will also look at other events with possibly similar scenarios, try to understand if there are systemic weaknesses which may contribute or facilitate such scenarios. 
 
 "We will in particular look at the cockpit door locking as well as the criteria and procedures applied to detect specific psychological profiles."
– Investigators carrying out the grim task of recovering wreckage and human remains from the Germanwings crash say they have not found an intact body—or the flight data recorder. To aid the search, an access road is being built to the remote site in the French Alps, where forensic teams have so far recovered DNA belonging to 78 of the 150 people killed, the Guardian reports. Investigators say that so far, only the empty protective casing of the black box has been found. In other developments: Co-pilot Andreas Lubitz is believed to have deliberately crashed the plane, but with the failure to find the flight's second black box, some in the aviation world are saying it is too early to rule out other causes. Airbus chairman Tom Enders slammed TV coverage of the crash in an interview published yesterday, Deutsche Welle reports. "Sometimes people there speculate, fantasize, and lie with no basis in fact," he said, calling some of the reporting "outrageous nonsense" that was a "mockery of the victims." The cockpit voice recorder was recovered soon after the crash, and German newspaper Bild has published what it says is a leaked transcript. Capt. Patrick Sondenheimer (also spelled Sonderheimer or Sondheimer, depending on the source) can be heard pleading for Lubitz to let him back in the cabin, shouting, "Open the goddamn door!" as passengers scream minutes before impact, according to the transcript. A spokeswoman for France's accident investigation agency tells CNN that investigators are "dismayed" by the leak. Over the weekend, there were reports that Lubitz suffered from a psychomatic illness that may have been linked to a vision problem. German newspapers, including Bild, also reported that Lubitz's girlfriend, a teacher, was pregnant and the couple had planned to marry, according to the Independent. In Lubitz's hometown of Montabaur, the local Lutheran pastor tells the AP that despite mounting evidence that Lubitz caused the crash, he was still part of the community and the church is standing by his family. He says Lubitz's mother is a part-time organist for the church and he knew the co-pilot as a teenager. "This does not make sense. It is incomprehensible for me, for us, for everyone who knew her and the family," he says.