According to a distinguished historian, British officials solicited the help of the FBI to obliterate incriminating files that alleged Lord Louis Mountbatten - a cherished confidant of King Charles and a victim of a 1979 IRA assassination - was a pedophile drawn to young boys.

Dr. Andrew Lownie, the author behind 'The Mountbattens: Their Lives and Loves', reveals he unearthed this concealed palace intrigue within a hidden dossier detailing the life of the late Earl. Lownie asserts that a document accused Mountbatten, the former Royal Navy head, of homosexuality, underpinned by a troubling attraction towards underage males.

The historian explains that when he sought further records concerning the late Prince Philip's maternal uncle, US law enforcement officials confessed that these papers were destroyed soon after his request. Lownie argues that the buried intelligence was "unequivocally" eradicated at the behest of the British Government, which was apparently oblivious to the existence of such damaging material.

Mountbatten was renowned for his intimacy with the royal family, including Queen Elizabeth, wife of Prince Philip, and their eldest son Charles, who was formally crowned King recently.

Sources intimate that the FBI initiated the collection of damning evidence on the WWII hero in February 1944, soon after his appointment as the Supreme Allied Commander of the Southeast Asia Theatre.

The agency reportedly interrogated Baroness Decies, Elizabeth de la Poer Beresford, who later passed away in a London hotel, after identifying Mountbatten as a predator with a proclivity for young boys.

An isolated file scrutinized by Lownie reads: "Lady Decies believes he is incapable of managing any form of military operation due to his condition." Unprompted, Decies also criticized Mountbatten's wife, Lady Edwina Mountbatten, for her "similarly erratic" behavior, attributing it to her multiple sexual escapades with other men.

The document, signed by E.E. Conroy, the then head of the FBI's New York field office, states the blunt baroness seemed to lack a hidden agenda behind her claims.

Lownie further states his investigation into Mountbatten's assassination has also hit a roadblock. Despite current rules stipulating the depositing of historical records in the National Archive after 20 years, he found no files on Mountbatten's 1979 murder in either Irish or British archives.

Globe reported on the source's comments.