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 SHARE COPY LINK FBI Director James Comey talked about the bureau's initial investigation of Omar Mateen, who later killed at least 49 people at Pulse night club in Orlando, Florida. Late Monday came word that Mateen's wife, Noor Zahi Salman, was not cooperating with authorities, according to a law enforcement official who spoke on the condition of anonymity. Although records show the couple didn't divorce for two years after their 2009 marriage, Yusiufiy said she was actually with Mateen for only four months because he was abusive. An off-duty officer working at the club initially responded to the shooter, "engaging in the gun battle with the suspect" before the suspect went back into the club, Orlando Police Chief John Mina said at a Sunday morning news conference.The shooter held several people hostage for several hours. She remembers seeing her friend for the last time the day before the shooting. Mateen graduated with a degree in criminal-justice technology from Indian River Community College in 2006, the same year he changed his name from Omar Mir Seddique to Omar Mir Seddique Mateen, according to civil court records in St. Lucie County. Born in the New York City borough of Queens in 1986, he moved with his family to the Long Island town of Westbury two years later and then in 1991 to Port Saint Lucie, Florida, about 125 miles southeast of Orlando. SHARE COPY LINK Families of victims of the shooting at Pulse nightclub gathered at the Beardall Senior Center in Orlando to get information on their missing loved ones on Mon., June 13, 2016. “Sometimes you can live with someone and not know who they are.” 
 
 But after college, Omar Mateen’s dreams of becoming a police officer were thwarted when he failed to pass his probationary employment period at Martin County Correctional Institution, a state prison in Indiantown where he worked as a trainee officer for six months until he was let go in 2007. A woman who said she was once a neighbor of Mateen's said the security company assigned him to guard the back entrance of PGA Village, a golf resort in Port St. Lucie. He was assigned to the St. Lucie courthouse in 2013, when he first came to the attention of the FBI after he allegedly told co-workers he had connections to the terrorist group al-Qaeda. As part of their investigation, the FBI interviewed witnesses, provided physical surveillance, and interviewed Mateen on two separate occasions, but the investigation was ultimately closed, according to a federal law enforcement source.In 2014, the FBI opened a second investigation into Mateen for his ties to Florida-born Moner Mohammad Abu-Salha , the first known American suicide bomber – who blew himself up in Syria in 2014.
– The night that Omar Mateen carried out the deadliest mass shooting in US history was far from his first visit to Orlando's Pulse nightclub, surviving customers say. The Orlando Sentinel spoke to at least four customers who recalled seeing Mateen in the LGBT club. Ty Smith says he had seen the 29-year-old there at least a dozen times and remembers him talking about his father and telling him he had a wife and child. "Sometimes he would go over in the corner and sit and drink by himself, and other times he would get so drunk he was loud and belligerent," Smith says. Another customer says Mateen had been coming in for years and was prone to violent outbursts. In other developments: Kevin West, another Pulse regular, tells the Los Angeles Times that he had exchanged occasional messages with Mateen for a year on the gay dating app Jack'd but had never laid eyes on him until an hour before the shooting, when he spotted him while dropping a friend off at the club. "He walked directly past me. I said, 'Hey,' and he turned and said, 'Hey,' and nodded his head," West says. "I could tell by the eyes." Pulse regular Cord Cedeno tells MSNBC that he and his friends had seen Mateen on gay dating apps, including Grindr. "I instantly blocked him because he was very creepy in his messages. I blocked him immediately," Cedeno says. No profiles of Mateen from such apps have surfaced yet, though Cedeno says two friends that encountered Mateen online have turned their phones over to the FBI. Lisa Lane, a performer at Pulse, tells the Advocate that she knows Mateen's face from her shows at the club. "He was one of my fans," she says. "Always when he saw me he would talk to me." In a look at Mateen's past, the AP finds an all-American list of early employers: Publix, Circuit City, Chick-fil-A, Walgreens, and Gold's Gym. He worked at a state prison for six months beginning in 2006 and was hired the following year by security firm G4S. His assignments included guard duty at the St. Lucie County Courthouse in Fort Pierce. Up until the Pulse massacre, he was working as a security guard at a gated retirement community. Former classmates at Florida's Martin County High School tell the Miami Herald that Mateen was a loner who behaved very strangely on the week of the 9/11 attacks—at one point, he claimed Osama bin Laden was his uncle—and was expelled soon afterward. A law enforcement source tells People that Mateen and his wife, Noor Zahi Salman, visited Walt Disney World in April, and Mateen may have been looking for potential targets at the time. NBC Bay Area reports that Salman, Mateen's second wife, grew up near San Francisco and moved to Florida around five years ago, which is apparently when she married Mateen. WSVN reports that she was accompanied by police officers Monday night when she went to the apartment she shared with Mateen and their 3-year-old son to pick up belongings.