(Newser) – It is likely the first fatal atomic wedgie on record but prosecutors won't have to try to reconstruct it in the courtroom. An Oklahoma man has pleaded guilty to first-degree manslaughter in the death of his stepfather, who was found dead with his underwear pulled over his head, with the elastic band cutting off his air, the Shawnee News-Star reports. Brad Davis, 34, had initially been charged with first-degree murder but the former Marine pleaded guilty to the lesser charge before trial could begin on Monday, saying he had killed 58-year-old Denver Lee St. Clair "in the heat of passion while defending myself in a fight that got out of hand and went too far," reports the Oklahoman.

Police say both men had been drinking on the night of Dec. 21, 2013, and a fight ensued after St. Clair allegedly spoke ill of his estranged wife, Davis' mother, KFOR reports. In a hearing early in the case, investigators testified that Davis knocked out his stepfather before the killer wedgie and took photos both before and after, reports the News-Star. Davis' lawyer says his client never intended to kill St. Clair and had described the wedgie as a "horrible thing" even before he knew it had been fatal, the Oklahoman reports. The lawyer says Davis "was just tired of taking it. He had been bullied all his life by this guy." Davis, who is being held without bond, will be sentenced in July and could get anywhere between four and 35 years. (Underwear can also kill your sperm, researchers warn.)

