Demetrius Walker was 22 when he was found shot and killed in Philadelphia on August 10, 2012. The death was ruled a homicide amid a year in which gun violence drove a large share of the city’s murders and disproportionately affected young Black men.

Walker’s killing was investigated by local authorities, but no arrests have been announced and no suspects have been publicly identified. The case remains open but unsolved, with investigators reporting a lack of sufficient evidence and witnesses that has stalled progress.

Does anyone have information about Demetrius Walker, where he was the night of August 10, 2012, or any detail that could help the investigation?