Toshiba Sharon, an announcer for the video game tournament from Philadelphia talks to members of the media about what he saw during Sunday's mass shooting across the street from the Jacksonville Landing... (Associated Press) 
 
 Toshiba Sharon, an announcer for the video game tournament from Philadelphia talks to members of the media about what he saw during Sunday's mass shooting across the street from the Jacksonville Landing in downtown Jacksonville, Fla., Monday, Aug. 27, 2018. Authorities say 24-year-old David Katz of... (Associated Press) 
 
 JACKSONVILLE, Fla. (AP) — A California man who played video games to earn money for college and a West Virginian whose e-sports winnings helped support his young family were slain at a Florida tournament where a gunman specifically targeted fellow gamers, authorities said Monday. 
 
 David Katz, 24, of Baltimore fatally shot himself after killing the two men and wounding 10 others Sunday inside a pizzeria and bar that were hosting a "Madden NFL 19" tournament. Katz was among about 130 gamers attending the competition at a mall in Jacksonville. 
 
 Court records in Maryland reviewed by The Associated Press show Katz had previously been hospitalized for mental illness. Divorce filings from his parents say that as an adolescent he was twice hospitalized in psychiatric facilities and was prescribed antipsychotic and antidepressant medications. 
 
 Katz carried two handguns, including one equipped with a laser sight, into the tournament venue but only fired one of them, Jacksonville Sheriff Mike Williams told a news conference Monday. He said surveillance video revealed Katz was the only shooter, but his motive remains unknown. 
 
 "The suspect clearly targeted other gamers who were in the back room" of the pizzeria, Williams said. "The suspect walked past patrons who were in other parts of the business and focused his attention on the gamers." 
 
 Investigators determined Katz bought both guns in Baltimore within the past month. But Williams said there's no indication he planned the shooting before Sunday. 
 
 The sheriff had previously said nine people were wounded by gunfire, but told reporters Monday the total was 10. All of them, he said, were expected to recover. 
 
 The sheriff's office identified the dead as 22-year-old Elijah Clayton of Woodland Hills, California, and 28-year-old Taylor Robertson of Giles, West Virginia. 
 
 Clayton's parents and other relatives gathered outside police headquarters Monday in Jacksonville to give a brief statement. A cousin, Brandi Pettijohn, said the family was "devastated by yet another senseless act of gun violence." She said Clayton was a good, peaceful man who never had a fistfight. 
 
 "He loved football, and out of all the videogames he could play, he settled on and mastered 'Madden,'" Pettijohn said. "He made a good living gaming, and he saved his earnings so he could afford to go to college to continue his education." 
 
 Robertson, who used the gamer tag "Spotmeplzzz," won the Madden Classic tournament in 2016. In a YouTube interview published by EA Sports, Robertson said he had played Madden NFL since he was 10 and started playing competitively a few years ago. 
 
 "It's certainly possible for any player to do this," Robertson said in the video. "You've just got to put in the time. You've got to grind. You've got to play a lot of games and just working on getting better." 
 
 Fellow gamers described Robertson as a family man dedicated to his wife and children. 
 
 Gamer Derek Jones, who lost to Robertson in the 2016 tournament, said his onetime rival was "one of the nicest people I ever met." 
 
 "There's no way that guy did anything to deserve to get shot," said Jones, who traveled to the Florida tournament from Santa Fe, New Mexico. "He's got a family at home, and he just came out here to try to win some money for this family." 
 
 Gamer Shay Kivlen of Seattle said he met Clayton, whose gamer tag was Trueboy, about five years ago. They bonded because both of them played games on a Playstation 4 — which put them at odds with many gamers who prefer Microsoft's Xbox. 
 
 The two friends would chat daily online and see each other about six times a year at gaming tournaments. About a week before the Florida shootings, Kivlen said, he was visiting San Diego and Clayton drove 2 ½ hours in rush hour traffic to meet him. 
 
 "He was one of the kindest people, most genuine guys I've ever met," said Kivlen, 21. "He was super real, and that's what I loved about him. If he was happy, you knew he was happy. He wore his emotions on his sleeve." 
 
 Kivlen and Jones said they barely knew Katz, who seemed to avoid conversation with fellow players during tournaments. Katz's gameplay was often erratic, Kivlen said. 
 
 "He would do kind of weird stuff online that other people wouldn't do. He would catch a ball and just start jumping out of bounds and stuff when he could have gotten more yards, just hurting himself," Kivlen said. "I don't know what he was doing." 
 
 Kivlen, who said he had once beaten Katz for a coveted spot in a tournament, heard secondhand from a friend that Katz was asking for his whereabouts shortly before the shooting. 
 
 After losing his single-elimination game Sunday, Kivlen said, he left to take a nap at his hotel about 20 minutes before the attack. He was watching a live stream of the tournament online when the gunfire erupted. 
 
 A friend hiding in a bathroom at the venue answered his phone. When he said Kivlen may have been a target, Kivlen called police and an officer was sent to his hotel room for about 90 minutes until they received word that the gunman was dead. 
 
 "It just doesn't make sense why he would do it," Kivlen said. "In 'Madden,' you never get so mad at a loss that you would want to do that." 
 
 ___ 
 
 Associated Press writers David McFadden in Baltimore, John Raby in Charleston, West Virginia, and Tamara Lush in the Tampa area contributed to this report. ||||| Law enforcement boats patrol the St. Johns River at the scene of a multiple shooting at the Jacksonville Landing Sunday, Aug. 26, 2018 in Jacksonville, Fla. A gunman opened fire Sunday during an online... (Associated Press) 
 
 Law enforcement boats patrol the St. Johns River at the scene of a multiple shooting at the Jacksonville Landing Sunday, Aug. 26, 2018 in Jacksonville, Fla. A gunman opened fire Sunday during an online video game tournament that was being livestreamed from a Florida mall, killing multiple people and... (Associated Press) 
 
 JACKSONVILLE, Fla. (AP) — The Latest on a deadly mass shooting at a video game tournament in Jacksonville, Florida (all times local): 
 
 10:15 a.m. 
 
 A gaming rival of the former gaming champion suspected of killing two competitors, wounding nine others and killing himself recalled him as "being kind of different." 
 
 Shane Kivlen was the best friend of one of the gamers who was killed in Sunday's shooting at Jacksonville Landing in Florida. 
 
 Kivlen tells The Associated Press that 24-year-old David Katz didn't talk much with fellow gamers, either online or when they met face-to-face for Madden tournaments. He says much of what he and others knew of Katz, they learned from his baffling style of playing the game. 
 
 Kivlen says Katz was smart, "but something was off about him." 
 
 He says Katz wasn't known to trash talk with rivals. But after winning a championship last year, Kivlen says Katz "got up and let out the weirdest scream ever." 
 
 Kivlen was at his Jacksonville hotel when the shooting happened Sunday. 
 
 ___ 
 
 12:40 a.m. 
 
 Authorities say a gunman opened-fire at an online video game tournament in Florida, killing two people before fatally shooting himself as a livestream of the event appeared to capture gunfire, shouts and screams. 
 
 Jacksonville Sheriff Mike Williams said at a news conference after the rampage Sunday afternoon that nine other people were wounded by gunfire and two others had been hurt in the chaos as people sought to flee. 
 
 He said authorities believe 24-year-old David Katz of Baltimore carried out the attack with at least one handgun at the Jacksonville Landing, a complex of eateries and shops on the St. Johns River in that north Florida city. He says the suspect died of a self-inflicted gunshot and authorities were still confirming his identity. 
 
 He says he has no immediate motive for the shooting. ||||| Authorities in Jacksonville, Fla., have identified a Maryland man as the perpetrator of a mass shooting Sunday during a video game tournament. 
 
 “The single suspect in this case is a white male,” Jacksonville Sheriff Mike Williams said at a news conference Sunday night. “We believe the suspect to be 24-year-old David Katz of Baltimore, Maryland.” 
 
 Katz is believed to have opened fire during a “Madden 19” qualifying tournament at a Chicago Pizza around 1:30 p.m. He killed two people and left 11 others wounded before killing himself. 
 
 Here’s what we know about Katz: 
 
 A Baltimore man has been identified as the gunman who opened fire at a Jacksonville, Fla., Madden video game competition Sunday. David Katz, 24, had been participating in a tournament for the Madden football game franchise, and was among those pronounced dead at the scene. Federal authorities were at a home near in Baltimore's Inner Harbor on Sunday night as part of an investigation. (Kenneth K. Lam) (Kenneth K. Lam) 
 
 » No motive is known for the Jacksonville shooting. The Los Angeles Times reported that Katz had been eliminated from the tournament before he began his rampage. 
 
 » People in the online gaming community said Katz had played under the game tag “RavensChamp” and “Bread.” 
 
 » Jacksonville Sheriff Mike Williams said Monday that Katz legally purchased the two handguns he used in the shooting from a licensed dealer in the Baltimore area. 
 
 » Local FBI and ATF officials are assisting the Jacksonville sheriff’s office with the investigation. They were at a home tied to Katz in the 1200 block of Harbor Island Walk near Baltimore’s Inner Harbor on Sunday night. 
 
 » He was raised in Columbia by parents Richard and Elizabeth Katz. At the time of their divorce in 2005, Richard Katz was a prominent engineer who designed electronics for NASA spacecraft. Dr. Elizabeth Katz worked as a toxicologist for the U.S. Food and Drug Administration in Rockville. 
 
 » Katz was a 2011 graduate of Hammond High School in Howard County. He also attended the University of Maryland previously, but was not a enrolled this semester, university President Wallace Loh said. He enrolled beginning in September 2014, and majored in environmental science and technology, a university spokeswoman said. He did not live on campus. 
 
 » As an adolescent, Katz displayed psychological and behavioral problems, according to court records. He was hospitalized at Sheppard Pratt Health System in Towson for psychiatric treatment in 2007. By age 12, he was taking Risperdal, an anti-psychotic drug to treat schizophrenia and bipolar disorder, his father said in court records. He often missed school and resisted treatment. 
 
 » A decade before Sunday’s shooting, a psychologist told lawyers that Katz was not likely to harm other people but could target his mother, with whom he lived as a teenager. 
 
 » In 2009, Elizabeth Katz called 911 on her son, telling the operator, “He has been abusive for over two years,” according to a transcript. David Katz later called 911 on his mother, claiming that she came at him with a knife. 
 
 » According to one local gamer, Katz sometimes attended a weekly game night at a sports bar near M&T Bank Stadium. 
 
 » Katz had previously won several tournaments and boasted of his prowess in an interview posted to YouTube. 
 
 » In a video circulating social media, an announcer is heard introducing Katz by commenting on his intense focus and standoffish attitude. “David Katz keeps to himself. He’s a man of business. … He’s not here to make friends.” 
 
 » Authorities say they’ve found Katz’s car, and that they have video of the incident. 
 
 » Katz is believed to have stayed in the Jacksonville area the night before the shooting, possibly at a hotel. 
 
 Baltimore Sun reporters Tim Prudente, Justin Fenton, Hallie Miller and Talia Richman contributed to this article. 
 
 ctkacik@baltsun.com 
 
 twitter.com/xtinatkacik ||||| The 24-year-old man who killed two people before turning the gun on himself at the Jacksonville Landing Sunday had a history of being emotionally distant, according to the gamers who played him. Court records show that he had previously been hospitalized in psychiatric facilities. 
 
 His parents filed for divorce 13 years ago, and during their long-running custody battle, his dad and mom fought over the state of his mental health, according to the Associated Press and the Baltimore Sun. His dad claimed Katz's mom was exaggerating symptoms of mental illness. 
 
 Twice as a teenager, he was hospitalized at mental health hospitals, according to the two news organizations. 
 
 On Sunday, he fired a semi-automatic handgun at 12 people, two who died and 10 more were treated for their gunshot wounds, according to Jacksonville Sheriff Mike Williams. 
 
 Katz had two guns on him at the time of the shooting, a .45-caliber handgun and a 9-mm handgun, according to Williams. One of the guns had an after-market laser sight on it. In a livestreamed video taken just before and during the shooting, one of the players appears to have a red dot show up on his body. 
 
 Katz walked past other patrons at the Chicago Pizza restaurant in the Jacksonville Landing, Williams said, before targeting gamers. Williams said there is "no indication that this was something he planned prior to Sunday." 
 
 The single-elimination tournament was a qualifier to go to the Madden Classic in Las Vegas. Jacksonville's event was one of four Madden Classic regionals, and it attracted gamers from across the country. According to the tournament's online bracket, Katz lost in the first of six rounds. Online, gamers have said that Katz opened fire. 
 
 Katz previously attended the University of Maryland but was not attending this semester, according to the university's president. 
 
 He appears to have been active on Reddit, talking about the Baltimore Ravens and building computers, as well as asking people to help him with homework. 
 
 The Baltimore Sun quoted a former teaching assistant a the university who said he "did not open up the same ways as the others did." 
 
 On Twitter and Twitch, a video-streaming site for eSports, fellow gamers said he had often been emotionally disconnected. One called him a "scumbag" last year. Another said yesterday that "He was weird but he never mentioned anything about hurting any1 he’d just ban them and stop talking to him he was definitely weird tho." 
 
 "We’ve always known he was a little off and stuff just because he wasn’t social at all," Shay Kivlen told the Associated Press. Kivlen was at the tournament. 
 
 In a video from a previous tournament, an announcer describes Katz as emotionless. "David Katz keeps to himself," the man says. "He's a man of business. He's not here for the experience or to go out or this, that or the third. He's not here to make friends." 
 
 In February of last year, Katz surprised gamers when he won the Madden 17 Club Series. On the website for EA Sports, the maker of the Madden video game, a post said that "In what some are calling the most exciting moment in all the 2017 NFL Club Series Championships, David 'Bread' Katz won with a walk-off victory by completing an unbelievable pass as time expired to be crowned Buffalo Bills Champion." In an interview after Katz' victory, he said he was underrated and that "I think personally I'm one of the better players." 
 
 Eli Clayton, one of the victims in Jacksonville, also competed that year and was the Jaguars' champion. 
 
 Katz used the name "RavensChamp" (sometimes with different spellings) and variations of the word "Bread" in competitions. In a 2015 tournament he appears to have lost in a championship game to Clayton, one of Sunday's victims, according to an online bracket. 
 
 The Federal Bureau of Investigation said that Katz's mother and father have been helping the investigation. 
 
 >> Multiple people dead, including suspect, in mass shooting at Jacksonville Landing 
 
 >> Gamers mourn Landing victims: ‘Great people and did not deserve this’ 
 
 >> Mass shooting at Jacksonville Landing captured on livestream video 
 
 >> Jacksonville Landing shooting happened at Madden Classic preliminary 
 
 >> Jacksonville Landing has seen fatal violence before 
 
 >> Mark Woods: From this heartbreak must come action on gun violence 
 
 >> Photos: Scenes from mass shooting aftermath at Jacksonville Landing ||||| A 24-year-old Maryland man opened fire Sunday in the middle of a video game tournament at Jacksonville's waterfront mall, killing two people, injuring 11 more, then killing himself, Jacksonville Sheriff Mike Williams said, a chaotic scene at a venue synonymous with downtown. 
 
 The shooting, which happened around 1:30 p.m., was connected to a Madden NFL 19 video game tournament at Chicago Pizza in the Jacksonville Landing. David Katz, from Baltimore, was the lone suspect, using "at least one handgun" on the victims and himself, Williams said. He would not confirm the motive for the killing, though one witness had said the impetus for the shooting was because Katz had lost the tournament. 
 
 The FBI and Bureau of Alcohol, Tobacco, Firearms and Explosives visited Katz's Baltimore address Sunday and impounded his car. 
 
 "We have faced an occurrence that is all too common," Mayor Lenny Curry said. "At terrible times, we see the best in people, and today is no different." 
 
 >> Mass shooting at Jacksonville Landing captured on livestream video 
 
 >> Witness accounts, reactions from Jacksonville Landing shooting 
 
 >> Jacksonville Landing shooting happened at Madden Classic preliminary 
 
 The tournament — which attracted players from across the country to Jacksonville to compete for a spot in a 16-player competition in Las Vegas — was shown on a video game live-stream service called Twitch, which captured what sounded like gunshots and screams in the background of game play. Those images and sounds captivated local and national media and became a source of information for friends and family of the victims before police confirmed any details. Williams said investigators had seen the Twitch video. 
 
 At one point in the video, someone can be heard saying, "Oh f---. What did he shoot me with?" 
 
 The tournament included professional players, some of whom described the frightening scene and their injuries on Twitter. Drini Gjoka, one such player, said a bullet struck him in the thumb. 
 
 "The tourney just got shot up. Im leavinng and never coming back," he wrote. 
 
 "Worst day of my life," he wrote about 20 minutes later. 
 
 Jason Lake, founder and CEO of compLexity Gaming, a professional gaming company that Gjoka was a member of, said he was"cooperating with the authorities and we will be flying him out of Jacksonville as soon as we are given the green light from the officials on the ground." 
 
 The incident thrust Jacksonville into the troubled membership of cities that have experienced mass shootings during events that were supposed to be about entertainment. 
 
 Officials with UF Health Jacksonville, the top trauma hospital in the area, said they treated six victims ranging in age from 20-35, with one victim in serious condition. Some were hit in the torso, others hit in the ankle or wrist. Other hospitals also have patients. 
 
 "I heard a lot of gun shots back to back to back," said Rome Williams, who was in the Landing when the shooting started. 
 
 Gov. Rick Scott spoke with President Donald Trump about the incident and traveled from Naples to Jacksonville on Sunday evening. 
 
 The shooting prompted an outpouring of concern and comment from public officials and candidates running for office in Florida from local races to U.S. Senate. Both Republicans running for governor canceled planned appearances in Jacksonville on Monday, while the five Democrats each highlighted the need for elected officials to take action to curb gun violence. 
 
 It was also a major disruption in what had already been a violent weekend. A triple shooting Friday night at the Lee vs. Raines high school football game — a well-known rivalry — killed a 19-year-old former Raines student and injured two others who currently attend Raines and Lee. 
 
 >> Jacksonville Landing has seen fatal violence before 
 
 >> Mark Woods: From this heartbreak must come action on gun violence 
 
 >> Photos: Scenes from mass shooting aftermath at Jacksonville Landing 
 
 The copper-topped Jacksonville Landing — a sibling to Baltimore's Inner Harbor — has long served as the iconic backdrop for downtown, even as visitors and its fortunes have lagged in recent years. 
 
 About three blocks were cordoned off around the Landing on Sunday in the hours after the shooting. A police helicopter hovered in the air, and Coast Guard boats patrolled the St. Johns River near the Landing. A SWAT unit at one point appeared to be operating a bomb robot on the sidewalk outside a nearby parking garage, though it was not clear why. 
 
 Several members of Jacksonville Fire and Rescue were conducting a training exercise across the street from the Landing when they saw people running out of the building, including one who had been shot. Four responders rushed in without protective gear. Officials added that police responded within two minutes of the first 911 call. 
 
 Michael Barlow was working out on the riverwalk outside the Landing when he heard the approach of sirens. 
 
 "We saw a bunch of people getting taken out on stretchers," Barlow said. "I saw four people on stretchers and then two other guys getting carried. They weren't on stretchers, they were just being carried." 
 
 The waterfront mall still houses a handful of restaurants, including a Hooters restaurant and Chicago Pizza, and holds concerts and occasionally political rallies on the outdoor pavilion that fronts the St. Johns River. City officials and boosters have pined for years to replace or majorly renovate the Landing, but those efforts have so far proven fruitless and left City Hall and the building's owners locked in a contentious court battle. 
 
 The city owns the land upon which the buildings sit. Toney Sleiman, a longtime and outspoken co-owner of the Landing buildings, did not respond to a voicemail left on his cellphone Sunday. 
 
 This is not the first time violence has put an unflattering spotlight on the Landing. 
 
 A Martin Luther King Jr. Day shooting in early 2017 killed a 16-year-old boy — it was believed that was retaliation for a shooting that had happened earlier in the month on Laura Street during Art Walk, a street festival with vendors and musicians that attracts big crowds into downtown. In 2012, a Chicago Bears fan was stabbed to death inside Fionn MacCool's, an Irish-themed restaurant in the waterfront mall. 
 
 Asked if security would increase at the mall, Williams said he would look into that issue in the coming days. 
 
 Times-Union staff writer Steve Patterson contributed to this report.
– Police have identified the shooter at a gaming tournament in Jacksonville, Florida, Sunday as 24-year-old David Katz of Baltimore. What they don't know is what prompted Katz to open fire in the "Madden 19" qualifying tournament, fatally shooting two fellow competitors and wounding nine others before killing himself. But perhaps this is part of it: The Los Angeles Times and and Jacksonville.com both report that Katz had been knocked out of the tournament before his shooting spree. Related coverage: Intense: One thing that has emerged about Katz is that he was seen as an intense competitor. The Baltimore Sun notes that an announcer introducing Katz at the Jacksonville tournament said this of him: “David Katz keeps to himself. He’s a man of business. … He’s not here to make friends.” Competitor Shane Kivlen tells the AP that "something was off about him." Former champ: This video shows Katz, playing as "Bread," winning a 2017 tournament, along with a subsequent interview. The Washington Post writes that his "thin face is clenched in a serious look" during competition, and his "face is again drained of emotion" during the interview, "his eyes roaming the floor as he answers questions." The Buffalo Bills congratulated Katz after the 2017 win with this tweet.