Jason Alan Thornburg (born August 27, 1980) is an American convicted serial killer who was charged in December 2021 with the dismemberment and murders of David Lueras, Lauren Phillips and Maricruz Mathis, in Fort Worth, Texas. Thornburg additionally confessed to murdering his girlfriend, Tanya Begay, in Arizona in 2017 and his former roommate, Mark Jewell, in Texas in May 2021.
During the investigations and trial for the 2021 Fort Worth murders, Thornburg testified that he committed the triple slayings for ritualistic sacrifices, and even engaged in cannibalism.
