Father Gabriele Amorth, who was appointed by Pope John Paul II as the chief exorcist of the Vatican, claims that the a teenage girl who went missing in the 80s, Emanuela Orlandi, was murdered as part of underground Vatican sex parties with ties to the organized crime and foreign embassies.

Amorth said that in the summer of 1983, 15-year-old Orlandi was snatched from the streets of Rome and mysteriously vanished without a trace. He said she was forced to perform in sex parties.

This was a crime with a sexual motive, said Amorth, reported the Telegraph. Parties were organized, with a Vatican gendarme acting as the 'recruiter' of the girls. The network involved diplomatic personnel from a foreign embassy to the Holy See. I believe Emanuela ended up a victim of this circle.

For three decades, the fate of Orlandi has consumed Italian police investigators. In an effort to solve the cold case, police acted on an anonymous tip to a popular television show in which a supposed informant claimed Orlandi could be buried in a murdered gangster's tomb.

Last week, Italian authorities and forensic experts opened the tomb of mobster Enrico De Pedis's in their hunt for Orlandi's body. Bones not belonging to De Pedis were discovered in the crypt. Analysis is being done to determine if the bones belong to Orlandi.

De Pedis was a powerful and charismatic mobster who was ran a gang known as the Banda della Magliana. He was murdered at the age of 38 by members of his own crew after they had an internal dispute, reported the Sun.

Theories surrounding the missing Orlandi suggested that she was taken by De Pedis who wanted to put pressure on the Vatican to recover money that they were owed, reported the Sydney Morning Herald.

Another theory is that she was taken to be used as a bargaining chip in order to release Mehmet ali Agca, the Turkish gunman who attempted to assassinate Pope John Paul II, reportedly on orders from the KGB.

However, Father Amorth rejected these claims. Amorth said he is firm on his theory that the girl was abused and killed as that this was part all part of the conspiracy in the Vatican to cover up the sex parties.

'It led to the murder and then the hiding of her body, he said, reported the Daily Mail. Also involved is diplomatic staff from a foreign embassy to the Holy See.

The Vatican has yet to comment on Father Amorth's claims. However, they did say they have always co-operated with investigation into Emanuela Orlandi's murder.