Yep. The Black Muslims prospered in the prisons and related to their handlers in Chicago, the Nation of Islam I believe it was called.
"During 1973 and 1974, fourteen execution style murders and eight assaults occurred in San Francisco, whose police named the case "Zebra" after the special police radio band they assigned for the investigation. Twenty-two crimes in a six-month spree involved mostly white victims of the three black suspects.
And Eric Holder wasn't even Attorney General, then.