On Thursday, an Oklahoma man who killed his stepfather with an “atomic wedgie” in 2013, was sentenced to 30 years in prison, Reuters reports.

Brad Lee Davis, 35, pleaded guilty to first-degree manslaughter this May for knocking 58-year-old Denver Lee St. Clair unconscious and pulling his underwear over his head, causing him to asphyxiate.

According to prosecutors, St. Clair’s head wounds would have been fatal “if he hadn’t died from the wedgie first.” From News OK:

When authorities questioned Davis, he said St. Clair asked him to come over for drinks. The men began arguing and Davis told officers that St. Clair “came at him,” and they began exchanging blows.

Davis told investigators that he hit St. Clair’s head, causing him to lose consciousness.

Then, Davis said, he grabbed his stepfather’s underwear and gave him an “atomic wedgie” by pulling the underwear over his stepfather’s head.

“I’d never seen this before, but when we first looked at our victim seeing the waistband of his underwear was around his neck,” Pottawatomie County Sheriff Mike Booth said.

“This was not mutual combat,” said District Attorney Richard Smothermon at Thursday’s sentencing hearing. “This was not self-defense. It was pure aggression.”

Judge John G. Canavan Jr. said he would reconsider Davis’ sentence at a review in 12 to 18 months.