TribLIVE's Daily and Weekly email newsletters deliver the news you want and information you need, right to your inbox. An Erie police investigation into the shooting of a 13-year-old boy in what the city’s police chief said appears to have been a targeted attack on Dec. 5 has turned into a homicide probe. Chief Dan Spizarny said Thursday morning that investigators have been told that the boy, identified by the Allegheny County Medical Examiner as Kas-ir Gambill, had died of his injuries. The boy had been at UPMC Children’s Hospital of Pittsburgh after being shot multiple times as he and a 17-year-old relative walked away from another relative’s house on the city’s east side on Dec. 5 at about 9:30 p.m.