Around half of the 679-page document is set to be declassified within the next two days.

The files contain information about the late 'Thriller' singer's extensive lawsuits and information about his 1993 and 2004 child molestation investigations.

A source said: 'People are still questioning many things about the private life of this secretive pop star. Michael was an enigma and lived in riches and a lifestyle unlike anyone since Elvis Presley.

'This dossier is an incredibly important key to understanding what happened behind closed doors, and may help the world better understand Michael.'

Also included in the pages of the report are details of death threats made to the singer and efforts by a private jet company to profit from the alleged child abuse charges against him by installing hidden cameras in a plane used by the star.

Two cameras were placed on the plane, which was taking Michael to hand himself over for police questioning.

However, some parts of the document will remain hidden - including information relating to his death earlier this year - as it is part of an ongoing inquiry.

Michael died suddenly in June of acute poisoning from the powerful anaesthetic Propofol.