A teen wanted since May in a gun case was arrested Tuesday night while on the scene of an unrelated shooting on Ventnor Avenue, police said. The 17-year-old city boy was charged with two counts of unlawful possession of a weapon, possession of a large capacity magazine, possession of hollow-point ammunition, two counts of possession of a community handgun and possession of a defaced firearm. The boy is being held in the Harborfields juvenile detention facility in Egg Harbor City.