Mark Welcher was 38 when he was fatally shot in the 4200 block of 4th Street SE in Washington, D.C., on the night of December 29, 2000, just two days before his 39th birthday. Officers who responded found him with critical gunshot injuries; emergency responders were unable to save him.

The case remains an open, unsolved homicide. Investigators say no suspects have been publicly identified and no arrests have been made. The Metropolitan Police Department lists his death among the city’s unsolved killings and is offering a reward of up to $25,000 for information leading to an arrest and conviction.

If anyone knew Mark, was in that neighborhood that night, or has information about who might be responsible, please contact the Metropolitan Police Department with any details.