Police bodycam footage of Jon Jones' arrest in September showed the UFC fighter headbutting a police car and using racial slurs.
Adam Hill and Glenn Puit of the Las Vegas Review-Journal reported Jones was "detained on suspicion of domestic violence after a security guard at Caesars Palace noticed his fiancee, Jessie Moses, with a bloody lip and blood on her clothing."
The arrest happened in Las Vegas, where Jones was because he was being inducted into the UFC Hall of Fame.
"It's hard to bring this guy to Las Vegas, for any reason," UFC President Dana White said at the time, per Marc Raimondi of ESPN.