Katherine Jackson - Katherine Jackson's Book Collaborator Backs Suspicions Over King Of Pop's Will

The King of Pop's siblings, Jermaine, Janet, Rebbie, Randy and Tito signed a letter last month (Jul12) accusing estate bosses John Branca and John MCClain of faking the icon's legal papers prior to his death in June, 2009.

Tito and Jermaine subsequently withdrew their names from the letter aimed at overthrowing the administrators, but now Mann has filed papers in federal court claiming to be "in possession of evidence that casts substantial doubt on the validity of the will", according to the New York Daily News.

Mann submitted the legal documents on Monday (06Aug12) as part of his defence in an estate lawsuit which alleges the businessman made millions from Jackson's music, photos and drawings illegally.

Branca and MCClain believe Mann hauled in more than $1.5 million (£937,500) from Katherine Jackson's coffee table book, Never Can Say Goodbye: The Katherine Jackson Archives, in its first two days on sale in June, 2010 - and they want to recoup all the revenues, as well as damages.

Mann has previously blasted the accusations, insisting the executors have "absolutely no interest in the preservation of Michael Jackson's legacy and less interest in generating revenues for his beneficiaries".

Janet, Rebbie and Randy Jackson are continuing with their bid to prove the Thriller hitmaker's will is fake and their lawyer Blair G. Brown recently stated they stand to gain nothing financially from the legal action.

A statement from Brown reads: "It is important to stress that Janet, Randy and Rebbie have questioned the validity of the will with no financial motive whatsoever... Janet, Randy and Rebbie will continue to press forward in their search for the truth in order to carry out the wishes of their brother Michael."