Michael Jackson's death highlights celebrity drug abuse problem

New age author and a close friend and adviser of Jackson, Deepak Chopra also suspects that the singer had died due to an overdose of prescription drugs, aided by his doctors.

Chopra said the nanny of Jackson's children had repeatedly contacted him with concerns about Jackson's drug use since his acquittal from a child sex abuse case in 2005.

He said she told him a number of doctors would visit Jackson's homes in Santa Barbara County, Los Angeles, Miami and New York. But whenever the subject came up, Jackson would avoid his calls, Chopra said, adding that the influence of Jackson's doctors over his life was very strong.

"He first denied he had a problem and then admitted he was getting narcotics from several doctors," Chopra said, adding that he recently spoke to Jackson about drug use six months ago.

"Police focus on street drug dealers when more people become addicted to prescription drugs through their doctor. Many expensive Hollywood doctors are just drug dealers with medical degrees," he added.

Chopra said he had first had an inkling Jackson was receiving drugs from multiple sources following his 2005 acquittal on child-sex charges when the star had stayed at his home.