Omar Mateen opened fire in the popular gay nightclub Pulse on Latin night, killing 49 and injuring 53 people.  He later killed himself after a gun exchange with police.  Now as the investigation into his past continues, more people are speaking out about the man who carried out the worst mass shooting in U.S. history.

A new man has come forward claiming to be Mateen's lover.  The man says Mateen's terrorist attack was not rooted in homophobia, but instead was an act of revenge against Puerto Ricans.

The man, who preferred to remain anonymous, alleges that Mateen previously had unprotected sex with two Puerto Rican men, and one later confessed that he was HIV positive.  The alleged lover says he contacted the FBI and told them he was "friends with benefits" with Mateen for about two months, and that they had sex between 15 and 20 times.  He says they met through the gay dating app Grindr.  According to Univision, the FBI confirmed speaking to this anonymous witness.

Before this man came forward, there was suspicion that Mateen might have been a closeted homosexual and there were rumors that he indeed was on a gay dating app.  The man claims Mateen's wife knew he was gay and frequented gay bars, and that their marriage was a front to hide his sexuality.