This is what happened to a South Carolina man after he was caught red-handed allegedly raping his nephew's girlfriend in a bedroom at a home in Conway, South Carolina on Thursday January 1st.

The nephew, whose identity is being kept from the media, reportedly found 52-year-old William Mattson (pictured above) on top of his girlfriend and he responded by beating the heck out of him. You can see the result of the brutal beat down in the suspect's mugshot.

The man then pushed his uncle out of the house and called police. Mattson was arrested but the nephew was not charged over the incident. The police said he was "acting in defense for the victim."

The uncle is now facing charges related to the alleged sexual assault.