"I love him, but I have never seen a more scary side of addiction", said Tatum, who shares father Ryan O'Neal with her half-brother.
According to the clerk, he obliged and the suspect fled the store.
"O'Neal was detained and identified as suspect from the robbery", the spokesperson continued. The LAPD told Fox News that when they stopped O'Neal they found a knife on his person.
O'Neal is being held on $50,000 bail, but he is now being kept in custody on a probation hold.
According to the Los Angeles County District Attorney's Office, O'Neal was hit with six counts related to his arrest: one count each of second-degree robbery, assault with a deadly weapon, possession of a smoking device, possession of an injection/ingestion device and two counts of possessing a controlled substance.
Three years ago, O'Neal's half-sister Tatum (daughter of Joanna Moore) revealed that she was extremely anxious for him. He was sentenced to spend a year in a drug program and serve five years on probation.
Redmond was cuffed after he allegedly robbed a Los Angeles convenience store and threatened the clerk with a knife, People reported. He is requested to go to court on Thursday to determine if he will be granted bail or released. When Farrah died in 2009 after battling anal cancer, she left $4.5 million to Redmond, according to Radar Online.
Redmond has struggled with drug addiction for most of his adult life.
But in July 2015, he admitted to a judge in Los Angeles that he had again violated the terms of his probation stemming from his felony heroin drug possession conviction. Unfortunately, things only got worse as O'Neal grew older. Redmond has been in rehab a several times over the years, and his half-sister Tatum O'Neal, 54, has voiced her concern about his troubles. 'Nobody knows what to do with Redmond.