Black boys have often been triggers for the worst offenses. The 1943 Detroit race-riot during a hot, racially tense summer, was started by black boys who ran through the black neighborhoods of Detroit, telling grown men that some white men had pulled a "colored" woman out of a car and beaten her. It was a complete fabrication, but it started a tremendous riot in which numbers of people died, and President Roosevelt had to redirect armored troops to the streets of the cities to face, not the Afrika Korps, but Detroit rioters.
Then there were the Eight Trey Gangsta Crips who beat truck driver Reginald Denny nearly to death in an intersection in 1992.