I dug a bit deeper after seeing this as I was skeptical about a “wedgie” being the cause of death. And while it’s true asphyxia was the cause of death, it’s much more complicated. From Military.com (Davis was a vet):

“The autopsy revealed that the altercation may have been more than a simple fistfight. The prosecution in the case said St. Clair suffered head wounds that would have killed the man anyway, had he not been strangled by the atomic wedgie. They also allege that Davis staged the crime scene to look like more of an equal brawl.”