North Charleston Police Department (NCPD) detectives have arrested a fourth suspect in connection with the March 4 homicide at KC Mulligans on Rivers Avenue. The individual, 19-year-old Aiden Jeffery Roberts of North Charleston, is accused of supplying the firearm believed to have been used in the shooting. He has been charged with accessory before the fact of murder and is currently being held at the Al Cannon Detention Center.