Murray has plead not guilty to charges of involuntary manslaughter for allegedly administering a fatal dose of the drug Propofol to Jackson and is due back in court in January. In addition, Joe Jackson has filed a wrongful death lawsuit against Murray.
Katherine refused to say whether or not she thinks Murray murdered her son.
"I can't accuse him of murder," she told Winfrey. "I don't know if it was accidentally done or if it was intentionally done."
She admitted that she tried to keep him away from drugs like Propofol, just as she tried to get him to stop undergoing plastic surgery.
"I thought it was too small," she said of Jackson's post-surgery nose, adding that it looked "like a toothpick at one time." "I had told him, 'That's enough, why do you keep going?'"
Meanwhile, Joe Jackson used his time with Winfrey to emphasize that while he "never beat" Michael or any of this other children, he did hit them with a strap.
"He used a strap. Yes he did, he used a strap," Katherine said, sitting next to Joe.
Joe defended his actions.
"It kept them out of jail. It raised them right," he said. "My kids have never been in jail. Nine kids, never been in jail."