Father Gabriele Amorth warns that criminal activity within the headquaters of the Roman Catholic Church is a sign of Satan's growing influence.
The Vatican's chief exorcist for 25 years said sex crimes involving clergy are signs of the "smoke of Satan" in the church.
But crime in the Vatican has been a concern before. In 2003 Nicola Picardi, the then Vatican's chief prosecutor, said crimes per capita in 2002 were more than 20 times higher than in neighboring Italy, the BBC reported. He also said 90 percent of the complaints never lead to prosecution.
"The statistics show that there is a notable increase in litigation and in the complexity of cases, with consequences internationally and above all, for the public," Picardi said in the report.
Pickpocketing tourists is common, but killings are not. The last time a murder was committed in the Pope's home was in May 4, 1998 -- two months before Pope John Paul II died.
Amorth is suspiscious of the Holy See's crime scene report.
The Vatican investigation blamed Swiss Guard Cédric Tornay, 23, for murdering the newly named commander of the Swiss Guard Alois Estermann, 43, and his Venezuelan wife Gladys Meza Romero, 49.
After an investigation that lasted nine months, judicial officials labeled the case a murder suicide.
Amorth explains the possibility of a Satanic conspiracy within the Vatican in his recently released book "Father Amorth. Memoirs of an Exorcist" by Marco Tosatti.
"They covered up everything immediately ... here one sees the rot," said Amorth in an interview with Times.
Amorth is not alone in his skepticism.
According to the book "Poteri forti" by Ferruccio Pinotti, former No. 2 of the East German secret police, Estermann had been a secret agent since 1979.
In the book "City of Secrets" by journalist John Follain the speculation moves to allegations of a short homosexual affair between Estermann and Tornay.
Luc Brossollet, lawyer and co-author of a book called "Murdered in the Vatican," spent four years researching the case. He claims the results of the Vatican's autopsy are questionable.
“We are sure that Cédric didn't die in the position that the Vatican authorities said he did.
“They say that he was kneeling and his head fell a little bit forward. We know from the Swiss autopsy that when he died, Cedric’s head fell behind,” explained Brossollet in a Swissinfo.ch report by Isobel Johnson.
In 2005 Jacques Vergès and Brossollet filed a murder claim in Switzerland in behalf of Tornay's mother Muguette Baudat, who believes her son's suicide note was a fake. (Click here to visit the online Tornay memorial)
Amorth blames the murders on the devil: