A man accused of armed robbery in the parking lot of a Gainesville restaurant has been charged with additional, unrelated offenses. Brian Dwayne Ferguson also has been charged with possession of a firearm by a convicted felon and possession of a firearm in commission of a crime and terroristic threats, according to a news release Thursday from the Hall County Sheriff’s Office. Those charges stem from a Nov. 18 assault call at a home in the 7500 block of Persimmon Tree Road in Lula.