Antoinios Deangelo Butler, 25, was found fatally stabbed shortly after midnight on December 31, 2016, in the 4600 block of East Capitol Street NE in Washington, D.C. A Metrobus passenger saw Butler stumbling near the intersection and collapsing at a bus stop; a nearby D.C. Police officer rendered aid until medical crews arrived. Butler was taken to a hospital and pronounced dead.

Investigators say the violence likely began with a confrontation on a Metrobus that spilled onto the street. The Metropolitan Police Department released surveillance video showing a man in a hooded sweatshirt engaged in a verbal and physical altercation on a bus and sought the public’s help identifying him. No arrests or publicly announced identification of the person of interest have been reported in the materials available.

If anyone was on that bus or saw the struggle on East Capitol Street that night, please come forward with information that might help close this case.