A Detroit assault case against Trey Songz is heading to trial court after he waived a key hearing.Trey appeared by video on Friday in 36th District Court. He was charged in December after authorities said he threw microphones and speakers from the stage during a performance at Detroit's Joe Louis Arena.Prosecutors say someone was struck in the head by an object and an officer was punched.Trey faces charges of aggravated assault and assaulting a police officer.Trey became upset after he was told to end his concert and leave the stage at 11:30 p.m. Trey is due back in court on February 24.Trey is free on bond until then.