Yoo Young-chul, shown in this file photo dated July 26, 2004, is a death-row inmate convicted of 20 murders and other violent crimes. - Photo: Korea Herald DB
SEOUL: A former corrections officer has revealed new details about Yoo Young-chul, one of South Korea's most notorious serial killers, including his claims of being haunted by the ghosts of his victims in prison.
Yoo, now 54, was convicted of killing 20 people in Seoul between September 2003 and July 2004.
