According to the report, eyewitnesses said Bonnar was "driving erratically" before crashing. A group of people at the scene then surrounded Bonnar until authorities arrived and arrested him.
The group circled around Bonnar because they "feared he would hurt someone," per TMZ Sports. At least one of the eyewitnesses was armed at the time of Bonnar's arrest.
The 41-year-old retired from UFC in 2012 following his defeat to Anderson Silva at UFC 153. He returned to MMA for a bout against Tito Ortiz in November 2014 for Bellator, losing a split decision to Ortiz.
Bonnar was inducted into UFC's Hall of Fame in 2013 alongside Forrest Griffin. Bonnar and Griffin fought in the finale of The Ultimate Fighter's first season. Griffin won a unanimous decision in what many consider one of the greatest fights in UFC history.