The FBI has seized files from a private detective to celebrities, Anthony Pellicano, that reveals the deceased King of Pop Michael Jackson spent $35 million to keep silent 24 boys who had accused the superstar of sexual molestation.

The amount, spread over 15 years, provided more details of Jackson's molestation cases which he tried to suppress through Pellicano, Sunday People reports.

The files said that Michael once molested a boy inside a private movie theatre while the kid's mum sat just several rows in front of them.

Jackson had faced a sexual molestation case in 2005 filed by the family of Jordan Chandler, a 13-year-old male cancer survivor, but he was cleared of all charges by a Santa Barbara Country jury, although it is speculated that he paid the parents of the victim.

The files were not shown to prosecutors in the 2005 trials by Pellicano. It included phone transcripts, detective reports and audio recording of phone conversations by Jackson.

The filed identified 17 boys, which include child actors, dancers, a European and the son of a famous scriptwriter, whom Jackson allegedly molested at his Neverland Ranch.

One of those who openly accused Jackson of sexual abuse is dancer Wade Robson who claimed the molestations happened when he was between 7 and 14 years old.

In one incident, Michael was said to be caught by his staff groping a child star while they were viewing porn movies, while he was molesting another boy and playing with the penis of another boy inside his private cinema.

Stella LaMarque, a housekeeper in the Jackson home, and her husband Philip, were among the witnesses of Michael's molestation and obsession with child pornography.

However, one celebrity, actor Marlon Brando, was said to have asked, "What the hell is Michael doing with those kids?," according to the files.

Pellicano is in federal prison for wiretapping and weapons conviction. Ironically, he was hired by Jackson to keep the singer's dark secrets now out in the light.

The sexual molestation cases were revived because of a wrongful death lawsuit filed by the singer's mother, Katherine Jackson and the three children of the King of Pop against the AEG, the London producers of the concert.