Univision interviews alleged gay lover of Orlando mass shooter Omar Mateen

This undated image provided by the Orlando Police Department shows Omar Mateen, the shooting suspect at the Pulse nightclub in Orlando, Fla., Sunday, June 12, 2016. This undated image provided by the Orlando Police Department shows Omar Mateen, the shooting suspect at the Pulse nightclub in Orlando, Fla., Sunday, June 12, 2016. Photo: HONS Photo: HONS Image 1 of / 104 Caption Close Univision interviews alleged gay lover of Orlando mass shooter Omar Mateen 1 / 104 Back to Gallery

Spanish-language broadcaster Univision has one of the strangest interviews in the wake of the worst mass shooting in U.S. history – but if true would offer new insight into the attack. Reporter María Elena Salinas has a sit-down interview with a man claiming to have been Omar Mateen's lover.

The source, who remained anonymous in the interview, said he had a “friends with benefits” relationship with Mateen. The man said Mateen had a threesome with two people who met at the gay nightclub Pulse in Orlando, and one of those lovers admitted to being a carrier of HIV. He called the attack not one of terrorism but “revenge” on Puerto Ricans at the gay club.

Mateen opened fire at the nightclub during a Latin night event on June 12. He killed 49 people and wounded 53 more victims. Before the massacre, Mateen called 9-1-1 to swear allegiance to the Islamic State.

READ MORE: Complicated picture emerges of Orlando nightclub shooter

The anonymous lover told Univision he met with Mateen 15 to 20 times and called him “caring” and “sweet.” He said Mateen’s second wife knew her husband was gay.

The two met through the gay dating app Grindr. Previous witness reports said Mateen made contact with people through gay dating apps and had visited Pulse before.

The man said he spoke with FBI about his relationship with Mateen after the attack. The FBI confirmed the interview to Univision. The full interview can be viewed here.