July 20, 2024 – Tuolumne County Sheriff’s Office officials report that on Thursday, July 11, 2024, Deputies and Detectives from the Tuolumne County Sheriff’s Office served a search warrant, related to an ongoing investigation into Child Sexual Assault Material (CSAM), in the Phoenix Lake Estates area of Tuolumne County. The investigation stemmed from an online tip regarding a subject receiving CSAM over the internet.

Throughout the investigation, TCSO detectives authored multiple warrants to identify the location and person responsible for requesting and receiving the pornographic materials from an online source. The investigation led detectives to the home of 73-year-old Michael Kenneth Matheson, who was contacted at his residence during the search warrant service, and subsequently placed under arrest for possession of Child Pornography.

Matheson was booked at the Dambacher Detention Center for a violation of 311.11(a) PC - Possession of Obscene / Child Pornographic Material.

This investigation is still ongoing, no additional information will be released at this time.

Source & photo: Tuolumne County Sheriff’s Office