A former Southern California street gang leader has pleaded not guilty to orchestrating a 1996 drive-by shooting that killed rapper Tupac Shakur in Las Vegas. Duane “Keffe D” Davis is the only person still alive who was in the vehicle from which shots were fired and the only person to be charged with a crime in the case. The 60-year-old had attorneys appointed Thursday to his defense and the judge acknowledged that prosecutors won't seek the death penalty. Davis remains jailed pending another court appearance next Tuesday. He's originally from Compton, California, and was arrested Sept. 29 near his home in suburban Henderson.