According to TMZ, the Las Vegas Metropolitan Police Department has opened an inquiry into Trey and an alleged sexual assault. An unidentified victim claimed Trey, born Tremaine Neverson, pulled off the sexual assault at The Cosmopolitan. It is unclear when the alleged assault took place. However, Trey was in town over the weekend to celebrate his 37th birthday at hotspot Drai’s Nightclub on Saturday. Trey Songz is reportedly cooperating with authorities over the latest sexual assault allegation levied against him.