The reasons for Jon Jones' arrest revealed

"TMZ has learned Jon Jones pulled his fiancée's hair and bumped her head into a police car, leaving a dent in the hood and peeling paint. According to the Las Vegas Metro PD's arrest report, police arrived at the Caesars Palace Hotel at 5:08 a.m. on a call about noise and disturbance in a hotel room. The call included "a white woman with blood coming out of her mouth and nose" and "a black professional MMA fighter," the statement said.