A South Carolina man was severely beaten after allegedly raping his nephew's girlfriend on New Year's Eve.

AllTheNews.com is reporting that William Mattson, 52, can be seen in his mugshot with an eye swollen shut and cuts and bruises. The sexual assault suspect is accused of attacking the woman at a party while his nephew –the victim's boyfriend –was away, according to Myrtle Beach Online.

The nephew told police that he heard sounds coming from inside his father's bedroom when he returned to the party. He kicked down the door and says he found Mattson on top of his girlfriend. He said he punched Mattson repeatedly, driving him from the house.

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Members of the conversion crew take a break as the main scoreboard is lowered to the floor to be worked on as the arena gets ready for the next concert at State Farm Arena, Thursday, October 2, 2025, in Atlanta. The crew was working on creating a stage for the Friday, Oct. 3 Maxwell concert. (Jason Getz/AJC)

Credit: Jason Getz / Jason.Getz@ajc.com