U-T San Diego says the son of actor Ryan O'Neal checked himself into a residential rehabilitation facility instead of showing up for Thursday's hearing.
The 47-year-old faces up to four years in prison after pleading guilty to two felony charges of driving under the influence and possession of a firearm by a felon.
O'Neal was involved in a drug-fueled, head-on car accident in San Pasqual Aug. 2 that left another driver injured.
A $100,000 bench warrant was issued for his arrest.
O'Neal's lawyer Heather Boxeth says he relapsed by drinking alcohol after five years of sobriety and argued that going to rehab was a responsible thing to do.
