A third man has been has been arrested for the killing of a 16-year-old boy and wounding of a 16-year-old girl in a shooting in northwest Omaha. It happened around 2:30 Sunday morning. Police arrested 24-year-old Adam Gamble Monday. Gamble, 22-year-old Joshua Vanackeren and 26-year-old Matthew Saunsoci face murder and weapons charges.  Police say Montrell Wiseman died at the scene and that Desjuha Wilkinson was taken to Creighton University Medical Center with non-life-threatening injuries. Gamble, Vanackeren and Saunsoci are being held in Douglas County Jail.