Mark Alan Williams-Thomas (born 9 January 1970)[1][2] is an English investigative journalist, sexual abuse victim advocate, and former police officer.

[5] He also investigated several other high-profile cases, including the disappearance of Madeleine McCann and the PPE Medpro scandal surrounding Michelle Mone.

[6] Williams-Thomas was a policeman, and family liaison officer with Surrey Police from 1989 to 2000 becoming a detective constable for only a year before leaving due to unspecified circumstances.

[11][12] In 2003, Williams-Thomas was charged with blackmailing a funeral home director, after alleging that there were multiple bodies buried in unmarked graves.

[14] On 9 August 2012, ITV News broadcast an exclusive interview Williams-Thomas undertook with Stuart Hazell, who was the last person to see missing 12-year-old schoolgirl Tia Sharp.

[22][23] The Other Side of Jimmy Savile and Exposure: Banaz: An Honour Killing won the 2012 Peabody Award which was broadcast on 3 October 2012.

[25][26][27] In September 2013, MP Tim Loughton made a statement to Parliament in which he praised Williams-Thomas for his "modest but game-changing ITV documentary that exposed Jimmy Savile".

[36] On 11 November 2014, This Morning broadcast an exclusive interview with Jo Westwood,[37] the ex-wife of sex offender Max Clifford.

Series 2 of The Investigator featured the case of murdered student Jessie Earl, who disappeared from Eastbourne in 1980, her remains being found in 1989.

[42] In November 2020, in response to a campaign[43] led by Williams-Thomas into Earl's murder, the Solicitor-General, in a highly unusual move, gave permission to appeal the verdict for a fresh inquest.

[46] In April 2022, in an interview discussing the Netflix documentary Jimmy Savile: A British Horror Story, Williams-Thomas revealed concern about it, saying that the series might be harmful to Savile's victims due to his face being featured throughout, stating that, "I do worry as far as victims go, it's one of the things that strongly gets criticised now when the story's talked about, seeing his face - his picture on the front page.

[49] In December 2023, Williams-Thomas released a YouTube documentary, The Interview: Baroness Mone and the PPE Scandal,[50] purportedly to investigate the government's controversial "VIP Lane" at the start of the COVID-19 pandemic.