Police said the car was driven by a suspect who a half-hour earlier was involved in the shooting of Marvin Carr, also known as Chicago rapper Capo. Chief Keef and Capo were associates, said a spokesman for FilmOn Networks, which recently signed Chief Keef to a two-album deal. Carr, 22, was shot in the 7700 block of South Kingston Avenue and was taken to Advocate Christ Medical Center in Oak Lawn, where he died, according to authorities.