A teenager was arrested Wednesday on suspicion of murder after a Saturday shooting at an Adams County park killed a 15-year-old boy and injured another teen. The teenage suspect — who has not been identified by police due to his age — was arrested on suspicion of first-degree murder, first-degree assault and illegal possession of a handgun by a juvenile, according to a news release from the Adams County Sheriff’s Office. Adams County deputies responded to reports of gunfire at Rotella Park — near Welby at 1824 Coronado Parkway — around 11:18 p.m.