The man accused of setting fire to a mosque frequented by Pulse Nightclub shooter Omar Mateen has been sentenced to 30 years in prison after pleading no contest to arson, according to St. Lucie County Prosecutor Steve Gosnell. Joseph Schreiber, 32, was accused of setting fire to the Islamic Center of Fort Pierce on the evening of September 11, 2016. Mateen, who killed 49 people at the Orlando nightclub in June, had attended the mosque. No one was inside when the fire started, authorities said. St. Lucie County crews responded after two drivers called 911 to report flames on the building's roof. "Surveillance footage from cameras on the building revealed that a white or Hispanic male arrived on motorcycle at approximately 11:38 p.m.," according to a statement released at the time by the St. Lucie County Sheriff's Office. "In the video, it appears he is carrying paper and a bottle of some type of liquid. The male approaches the northeast side of the building and a flash is seen, presumably when the fire ignited. The male is then seen running from the building." Schreiber, a Floridian, was identified and arrested in connection with the fire two days later. He was charged with arson of a structure evidencing prejudice. Gosnell said Schreiber's plea of no contest Monday was adjudicated as a guilty plea.