A stash of disturbing and borderline illegal pornographic images were found in Michael Jackson's Neverland ranch before his death.

The Thriller singer, who 10 years after his death from a drug overdose faces fresh claims of sexual abuse and assault against underage boys, collected grim images of nude and partially clothed teenagers at his vast home.

Allegations made against him in the Channel 4 documentary Leaving Neverland focus on two of his alleged victims - Wade Robson and James Safechuck - who say Jackson groomed, molested and preyed upon them.

Now questions are being asked again about the materials found inside Jackson's home during a raid in November 2003.

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Some 70 detectives from the Santa Barbara County Sheriff's department raided the sprawling ranch months after disturbing footage was aired in Martin Bashir's documentary.

It was claimed the singer had stockpiled hundred of images showing pornography in a bid to seduce young boys - and he himself admitted sharing his bed with young boys.

The raid uncovered a huge collection of books, photos and footage at his Neverland home - much of which was pornographic.

His cache included transgender video porn, images of bondage and even what appeared to be young male erotica.

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Footage of the raid shows officers storming each room, finding Jackson's infamous mannequins, the arcade room he allegedly used to lure children, and a hidden closet at the back of his bedroom - which was reportedly kept locked with three deadlocks.

Inside the closet, police reportedly found everything from stuffed animals to a signed photograph of child star Macaulay Culkin and alleged naked photos.

Culkin had signed his photo: "Don't leave me alone in the house."

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Footage also reveals dolls and merchandise in the room.

When detectives raided the Billie Jean singer’s home as part of the child sex abuse investigation against him, they reportedly found a trove of twisted photographs he had stashed - but Jackson's family slammed the claims.

It had been widely reported that a previously unseen police document claimed there were at least seven collections which showed boys in their teenage years - and in some cases younger - fully nude or partially clothed in Jackson's bedroom.

One of the collections, Taormina Wilhelm Von Gloeden, is described in court papers as: "Nude photos of teenage boys from late 1800s."

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In the report, officers were said to have discovered photos and videos of men, women, boys and girls in sexual positions, drugs to treat sex addiction, with multiple prescriptions written by a number of physicians for people close to the star.

But Santa Barbara County Sheriff's Department spoke out at the time, insisting it didn't release the documents.

"Some of the documents appear to be copies of reports that were authored by Sheriff's Office personnel as well as evidentiary photographs taken by Sheriff's Office personnel interspersed with content that appears to be obtained off the internet or through unknown sources," a representative of the Department said in an email to Billboard.

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"The Sheriff's Office did not release any of the documents and/or photographs to the media. The Sheriff's Office released all of its reports and the photographs as part of the required discovery process to the prosecution and the defense."

The rep continued: "The documents with a header titled Sheriff's Department that contain a case number appear to be Sheriff's Office documents. The photos that are interspersed appear to be some evidentiary photos taken by Sheriff's investigators and others are clearly obtained from the Internet."

More than 70 members of the Santa Barbara County District Attorney's Office and Sheriff's Department raided the home while Jackson was in Las Vegas.

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It came at the same time an arrest warrant was issued for the singer, which saw Jackson later turn himself into police when he returned to California.

Speaking to US website Radar Online, an investigator on the case said: "The documents exposed Jackson as a manipulative, drug-and-sex-crazed predator who used blood, gore, sexually explicit images of animal sacrifice and perverse adult sex acts to bend children to his will.

"He also had disgusting and downright shocking images of child torture, adult and child nudity, female bondage and sadomasochism."

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The report stated that many of the materials featuring naked men and women in the home could be used for the purpose of trying to attract young men.

The investigator added: "Based on my training, this type of material can be used as part of the 'grooming' process, by which people (those seeking to molest children) lower the inhibitions of their intended victims and facilitate the molestation of said victims."

The items said to have been found included "a book depicting nude children" found in the singer's arcade room.

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The report also said there were multiple books found in the master bedroom that included one with 'naked and semi-naked gay men' and another with 'pre-teen or early teenage individuals' who in some cases were 'nude or semi-nude’, and 'a book which contained nude photographs of men' in the 'master bathroom'.

Santa Barbara Senior Assistant District Attorney Ron Zonen, who was part of the prosecution team that took on Jackson in court, said: "A lot of this stuff was used to desensitise the children, and Michael admitted taking one child after another into bed with him for long periods of time.

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"We identified five different boys, who all made allegations of sexual abuse."

Police also searched a rented storage space after Santa Barbara County Sheriff’s Detective Craig Bonner requested a warrant.

The request to search Shurgard Storage came after police received a tip-off that Jackson had moved items into the unit after the investigation was launched.

According to the report, materials seized were "notes, diaries, documents, photographs, audiotapes and videotapes", along with more than 80 video recordings and computer hard drives.

The investigator added: "The documents collected by the Santa Barbara County Sheriff’s Department paint a dark and frightening picture of Jackson.

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"The documents exposed Jackson as a manipulative, drug-and-sex-crazed predator who used blood, gore, sexually explicit images of animal sacrifice and perverse adult sex acts to bend children to his will.

"He also had disgusting and downright shocking images of child torture, adult and child nudity, female bondage and sadomasochism."

The Thriller star was charged in 2003 with seven counts of child molestation and two counts of providing an intoxicant to a minor under the age of 14 in order to seduce him.

The superstar faced up to 20 years in prison but was cleared of all charges in June 2005.

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Before his death, the Billie Jean singer paid out more than £100million in hush money to as many as 20 sexual assault victims.

Since he died aged 50 on June 25, 2009, Jackson’s estate has raked in billions from sales of his music and lucrative deals.

Jackson's family spoken out against the 2016 report of the 2003 raid, saying: "Seven years ago this coming Saturday, the world lost an amazing artist and humanitarian devoted to helping children in need in all corners of the world. Michael Jackson's fans, including the Executors of his estate, prefer to remember the wonderful gifts Michael left behind instead of having to once again see his good name dragged through the mud by tabloid trash.

"Everything in these reports, including what the County of Santa Barbara calls 'content that appears to be obtained off the Internet or through unknown sources' is false, no doubt timed to the anniversary of Michael's passing. Those who continue to shamelessly exploit Michael via sleazy internet 'click bait' ignore that he was acquitted by a jury in 2005 on every one of the 14 salacious charges brought against him in a failed witch hunt.

"Michael remains just as innocent of these smears in death as he was in life even though he isn't here to defend himself. Enough is enough."