The FBI has confirmed Samuel Little, 79, to be the most prolific serial killer in U.S. history. Little has confessed to 93 murders between 1970 and 2005, and FBI crime analysts believe all of his confessions are credible. Law enforcement has been able to verify 50 confessions, with many more pending final confirmation. He is currently in prison in Texas. Some of his professed victims, however, have not been identified. In interviews with Texas Ranger James Holland, Little describes five such killings. Little said the incidents took place in North Little Rock, Arkansas; New Orleans, Louisiana; Miami, Florida; Las Vegas, Nevada; and Covington, Kentucky.