Redmund O'NealThe year is already shaping up to be a bad one for Redmond O'Neal, who was taken into custody on drug charges while on a 24-hour leave from rehab.

Police arrested O'Neal -- son of actor Ryan O'Neal and the late Farrah Fawcett -- on Dec. 29 and he faces up to 6-years in prison for violating the terms of his probation, RadarOnline.com reports.

The staff of Impact, the treatment facility the 24-year-old was at, noticed O'Neal's condition when he returned from his leave.