He was an 'expert' on the Tupac Shakur murder mystery. Now he's on trial for killing rapper

For nearly three decades, a onetime Compton gang leader named Duane “Keffe D” Davis has been one of the most vocal theorists about one of the most debated celebrity killings ever. Rapper Tupac Shakur was at the height of his fame when he was fatally shot Sept. 7, 1996, while riding to a Las Vegas nightclub in a BMW driven by Death Row Records boss Marion “Suge” Knight. The events surrounding that night have been exhaustively investigated and recounted in numerous stories, documentaries and police investigations. But the mystery about exactly what happened has endured. This week, Davis is on...