(AP) - The murky picture of Orlando gunman Omar Mateen grew more complex Tuesday with word that the FBI is investigating whether he had been a regular at the gay dance club he attacked and had been leading a secret life as a gay man.Īs victims described the bloody horror of the massacre during a riveting hospital news conference, investigators continued to gather information on the 29-year-old American-born Muslim - and took a close look at his wife, too - for clues to the attack that left 49 victims dead.Īn official who was briefed on the progress of the case but insisted on anonymity to discuss a continuing investigation said authorities believe Mateen's wife knew about the plot ahead of time, but they are reluctant to charge her on that basis alone.Ī number of possible explanations and motives for the bloodbath have emerged, with Mateen professing allegiance to the Islamic State group in a 911 call during the attack, his ex-wife saying he was mentally ill, and his father suggesting he was driven by hatred of gays.