US' most prolific serial killer murdered 50 between 1970-2005: FBI

A man in the US has confessed to killing 93 people, with 50 murders verified so far, making him the most prolific serial killer in the US, the FBI said. Samuel Little said that he committed the murders between 1970-2005. "Little believed he would not be caught because he thought no one was accounting for his victims," an official said.