For now, the only public evidence against John Mark Karr is his own words. And questions have already been raised about the details of his story, including whether he drugged the 6-year-old girl, sexually assaulted her or was even in Colorado at the time of the slaying.
Those questions led some to wonder whether Karr was the answer to the long-unsolved slaying or a disturbed wannabe trying to insert himself into a high-profile case.