Charles Peterson, 26, was shot and killed in Pittsburgh’s St. Clair Village neighborhood shortly after 1 a.m. on January 3, 2007. He suffered fatal gunshot wounds to the head and torso and was found dead at the scene by Pittsburgh police.

Authorities linked the killing to Peterson’s role as a witness in an upcoming trial concerning the shooting death of a state trooper; investigators say he was targeted to prevent his testimony. Reports say he had ties to a group of drug dealers active in Pittsburgh’s southern hilltop neighborhoods and that suspects chased and gunned him down, a crime described as a deliberate effort to silence him. Police sought information on suspects in the days afterward, and several leads were reported, but it is unclear whether those leads produced arrests.

Does anyone have information about Charles, his movements that night, or the investigation that followed?