Celebrity choreographer Wade Robson, known for his work on Dancing With The Stars, has expanded his legal action against the late Michael Jackson, alleging that two companies controlled by Jackson were a front for “what is likely the most sophisticated public child sexual abuse procurement and facilitation organization the world has known.” Robson himself claims to have suffered nearly a decade of sexual abuse by Jackson, The Hollywood Reporter reports.

In 2013, Robson sued Jackson’s companies MJJ Productions and MJJ Ventures. Two months ago, he hired lawyer Vince Finaldi, who amended the lawsuit Friday to include numerous detailed, graphic allegations. In the complaint, Finaldi wrote:

MJJ PRODUCTIONS and MJJ VENTURES were held out to the public to be businesses dedicated to creating and distributing multimedia entertainment by MICHAEL JACKSON, however, in fact, they actually served dual purposes. The thinly-veiled, covert second purpose of these businesses was to operate as a child sexual abuse operation, specifically designed to locate, attract, lure and seduce child sexual abuse victims.

Robson, a native of Australia, met Jackson after winning a “dance-a-like” competition at age 5. During a trip to Disneyland, Robson’s mother set up a meeting with Jackson through Jackson’s assistant Norma Staikos, described in the complaint as “a ‘madam’ or ‘procurer.'” That led to Jackson inviting Robson’s family to Neverland Ranch, where 7-year-old Robson slept in Jackson’s bed and Jackson allegedly abused Robson for the first time. According to the complaint, the sexual abuse ranged from French kissing to sexual penetration and carried on until age 14, when Jackson was “no longer as interested in [Robson] sexually.”

In 2005, Robson was called to testify in Jordan Chandler’s suit against Jackson. Robson testified that no abuse had occurred, but he now claims Jackson called him daily leading up to the trial to coach him and “‘brain washed’ him into being a ‘good soldier.'” Robson did not believe he had been abused until he entered psychotherapy in 2012. He has not worked since.

The trial is scheduled to begin on 3/13/17.