Charles James Walker, a 47-year-old African-American man, was shot and killed on June 20, 2011, on a street at 826 Blue Hill Avenue in Boston. Responding officers from the Boston Police Department pronounced him deceased, and the Office of the Chief Medical Examiner ruled the death a homicide.

The shooting was one of several violent deaths in the city that year and remains unsolved. Detectives opened an investigation and appealed to the public for information, but no suspects have been publicly identified and no arrests have been announced.

Does anyone remember seeing or hearing anything on Blue Hill Avenue that evening that could help investigators?