Mateen had legally purchased at least two firearms - a handgun and a long gun - within the last week, the ATF said.Ī security company, G4S, said Sunday that Mateen had been employed there since 2007, adding that it was “shocked and saddened” by the shooting. He was not under investigation or surveillance at the time of the Orlando nightclub massacre, according to the FBI. citizen who was born in New York and later moved to Florida, authorities said. Mateen did not pose as a threat at that time, Hopper said. The FBI closed that investigation after authorities determined that contact between the two were minimal. The agency interviewed Mateen twice after being alerted to him speaking of possible terrorist ties in 2013 but officials were “unable to verify the substance of his comments.” Mateen came to the FBI’s attention again in the next year over possible ties to an American suicide bomber, Hopper said. Both investigations were closed after inconclusive interviews. He was first flagged on the FBI’s radar in 2013 and then again in 2014, FBI Assistant Special Agent in Charge Ron Hopper said at a news conference. Mateen had reportedly made calls to 911 early Sunday stating his allegiance to ISIS. The shooter has been identified as Omar Mateen, 29, of Port St.