The man who killed the rap icon Tupac Shakur in a drive-by shooting in 1996 has been sentenced to 40 years to life in prison. The killing went unsolved until Duane "Keffe D" Davis, who is now 63, started bragging about it in interviews and a memoir. He was convicted in August of first-degree murder with the use of a deadly weapon. #Tupac #KeffeD #US #C4News