Four men have been found guilty of first-degree murder while armed in a 1988 killing that D.C. police said stemmed from a turf war between drug dealers.

A jury convicted Eric V. Weaver, 21; Cary M. Sanders, 21; Aaron M. Howard, 24; and Terry Evans, 29, after a five-week trial presided over by D.C. Superior Court Judge Ricardo Urbina.

The four were convicted of killing Bobby Larnell Parker Jr., 23, in February 1988. Parker was in a car stopped at a traffic light at Chesapeake Street and Southern Avenue SE when a group of men surrounded his car and opened fire. Police said Parker was hit by 10 bullets.

Police said Parker was known to frequently rob other dealers of their drugs and money, and had stolen nearly six pounds of cocaine and thousands of dollars in cash from Weaver.

After the killing, then-Police Chief Maurice T. Turner called the ambush "the city's most brazen and arrogant show of disregard for life."

Weaver, Sanders, Howard and Evans were also convicted of carrying a pistol without a license. All four face mandatory sentences of 20 years to life imprisonment for their murder convictions, officials said.