Michael Jackson's mother sat in court Thursday as a police detective testified that she told him the family had tried drug interventions for the singer, believing he was addicted to painkillers.

But Detective Orlando Martinez said Katherine Jackson told him her son refused any help, saying he didn't have a drug problem.

The testimony came under questioning by lawyers for concert promoter AEG Live LLC, which is being sued by Katherine Jackson for negligence in the star's death.

Martinez, who took the lead investigating Michael Jackson's June 25, 2009, death, said he first interviewed his mother at the hospital. But six months later, he decided to go back to her and check out "some things regarding family meetings about addiction." He said it was then that she told him about several attempts by the family to hold interventions and get Jackson into rehab.

"Mrs. Jackson said the family tried to help him but he would have nothing to do with it," Martinez said. "She had asked Michael if he was taking any drugs, and he denied it."

Martinez said Katherine Jackson told him she believed her son was taking medicine for back pain and might have become addicted.

"What did Mrs. Jackson tell you?" asked AEG attorney Marvin Putnam.

"The family attempted several interventions," said the witness. "She had talked to her son about drugs herself."