Mark Alan Williams-Thomas (born 9 January 1970) is an English investigative journalist, sexual abuse victim advocate, and former police officer. He is a regular reporter on This Morning and Channel 4 News, as well as the ITV series Exposure and the ITV and Netflix crime series The Investigator: A British Crime Story. As a child-protection specialist, Williams-Thomas is best known for exposing Jimmy Savile as a paedophile in The Other Side of Jimmy Savile, a television documentary he presented in 2012 as part of the Exposure series, which received numerous awards and led to the Operation Yewtree police investigation. He has also investigated several other high-profile cases, including the disappearance of Madeleine McCann. From Wikipedia