Tatum O'Neal Will 'Move Heaven and Earth' To Help Jailed Brother

Redmond is still on felony probation and is being held without bail because of his most recent arrest. Redmond's half siblings, Patrick and Tatum, along with their father Ryan were at his arraignment last week. It was the first time the family had ever been to any of Redmond's numerous court appearances in connection with his DUI and heroin cases.

Tatum has battled an addiction to drugs, and is now in recovery, something she desperately wants her brother to maintain. "Tatum will move heaven and earth to do whatever she can to help Redmond get and stay sober. Tatum loves Redmond tremendously, and doesn't want to lose her brother to this disease. Tatum is sincere and genuine for her concern for her youngest brother," a source close to the family tells us.

Tatum's brother, Griffin O'Neal, reportedly has a warrant out for his arrest in San Diego, after he was involved in a head-on collision in San Diego last week for allegedly being under the influence at the time of the accident. The accident occurred on the same day Redmond was arrested. Cops had no comment about the warrant as they said it was "an ongoing investigation."

"Tatum is going to be there for Redmond, whatever he needs. But she knows as a person in recovery, she can want Redmond to get sober until the cows come home...Redmond has to want it," the insider says.