New details have surfaced about the 2016 Pulse nightclub massacre in Orlando, Florida, revealing the father of shooter Omar Mateen had worked as an FBI informant. Forty-nine people were killed when the shooter opened fire inside the LGBT nightclub, and most of the victims were young LGBT people of color. The new details show Seddique Mateen, Omar’s father, was a confidential FBI source from 2005 to 2016. He is now under investigation for money transfers to Turkey and Afghanistan. Omar Mateen’s widow, Noor Salman, is currently on trial on charges of providing material support to a foreign terrorist organization and obstruction of justice. Her lawyers filed for a mistrial over the revelations, saying the prosecution’s failure to disclose this information earlier violated her due process rights. A judge has rejected the request, saying it’s not relevant.