KOAT Albuquerque reports that a man who was convicted of murdering his parents as a teen has now been found guilty in a separate torture case. Mitchell Overhand, of New Mexico, killed and buried his parents in their backyard in the 1980s. This week, he was found guilty of false imprisonment and conspiracy to commit tampering with evidence.

Overhand’s latest victim is Matthew Tressler. Tressler told authorities that he walked into a friend’s house and was hit by a baseball bat. He was then bound and forced to look at a photo of his best friend, John Soyka, who had been mutilated and murdered. Overhand and Chase Smotherman held Tressler captive over a drug debt of $2,500.

Overhand admitted to authorities in 1988 that he murdered one of his parents, but also told them his friend killed the other parent. Overhand then buried both bodies in the backyard and threw a party. He was only 16 at the time, and spent most of his adult life in prison before being released in 2010.

Overhand, now 45, also faced murder charges for killing John Soyka, but he entered into a plea agreement with prosecutors to show them where his body had been dumped in Rio Puerco. However, a judge ruled that the prosecutor reneged on the promise he wouldn’t face charges for the homicide after charging him with evidence tampering and conspiracy. The judge determined that the charges had to be dismissed in that case.

*Photo credit Hearst Television, Inc.