Patrons told The Canadian Press that they had witnessed the 29-year old being escorted drunk from the nightclub several times. The gunman was seen drinking at Pulse on several occasions before he opened fire inside the gay nightclub, according to others who frequented the bar. At the time of the nightclub shooting, however, the FBI said he was not under surveillance. The FBI interviewed Mateen twice in 2013 and once in 2014 due to concerns about possible links to terrorism. The security firm G4S confirmed to the Palm Beach Post that Mateen had been an employee of the company since 2007.
Mateen was born in New York and later moved to Fort Pierce, Florida.
Police identified the shooter as Omar Mateen, 29.
Here is what we know about the deadly mass shooting in Orlando, Florida.