Omar Mateen opened fire at the Pulse Nightclub in Orlando, Fla., in June 2016. Mateen died in the attack, which left 49 victims. Only his widow stood trial for charges related to the massacre.

Omar Mateen opened fire at the Pulse Nightclub in Orlando, Fla., in June 2016. Mateen died in the attack, which left 49 victims. Only his widow stood trial for charges related to the massacre