Diamond Teague, 19, was fatally shot in the head on a porch in the 2200 block of Prout Street SE in Washington, D.C., in the early morning hours of October 9, 2003. He had been playing video games at home and stepped outside after a friend called; shortly after, laughter and a brief argument were heard, followed by a single loud pop.

Teague was active with the Earth Conservation Corps, had won a scholarship to the University of the District of Columbia for that fall, and played drums at Galilee Baptist Church. Friends and family described him as compassionate and not involved in street violence. The Metropolitan Police Department investigated but the case went cold; no suspects have been publicly identified and no arrests were announced. A friend who was at the scene reportedly passed multiple polygraph tests. A nearby park was later named in his honor.

Does anyone who knew Diamond or who was in that neighborhood on October 9, 2003 have information that could help solve his murder?