Samuel Little is a self-confessed serial killer with a knack for art. He's been sketching his alleged victims, some of whom haven't even been identified. The FBI just released 10 sketches with the hope of finding the women Little says he killed. Sixteen other sketches were previously released. Little is thought to have killed more than 90 people, which would make him the most prolific serial killer in the U.S. He is currently in prison after being convicted of killing three women in California.