By Dan Snierson
Updated August 02, 2011 at 10:11 PM EDT

Redmond O’Neal, the son of Ryan O’Neal and Farrah Fawcett, was arrested Tuesday in Santa Monica, Calif., when police allegedly found heroin in his car, reports the Los Angeles Times. The 26-year-old O’Neal, who has struggled with substance abuse for years and served time in jail and rehabilitation facilities for drug-related offenses, was also charged with violating probation and a red-light infraction. He is being held without bail while awaiting a court appearance.