Chief Keef may face jail time after images of him holding a rifle in a video hit the internet!!! The video was shot earlier this year when the 17-year-old rapper did an on-camera interview at a gun range in New York. In the video Chief Keef (whose real name is Keith Cozart) is reportedly seen with a rifle. Prosecutors have argued that by holding the rifle the rapper violated the terms of his probation following his conviction last year for pointing a gun at a Chicago cop. A hearing on the probation violation was scheduled for Dec. 17, the day before the his debute record on a major nationwide label is set to be released. Chief Keef could be locked up if the judge finds he violated his probation.