(Pope Benedict’s former butler Paolo Gabriele (R), accused of stealing and leaking the pontiff’s personal papers, sits at the start of his trial at the Vatican September 29, 2012. REUTERS/Osservatore Romano)

The court trying Pope Benedict’s former butler on charges of aggravated theft ruled on Saturday that the results of a sensitive separate investigation carried out by cardinals for the pope will not be admitted as trial evidence.

At the first hearing of the long-awaiting trial of Paolo Gabriele, charged with stealing and leaking sensitive papal documents alleging corruption in the Vatican, the court rejected a defense request to include the cardinals’ probe.

It ruled that the trial will be based only on an investigation by a Vatican prosecutor and Vatican police.

Gabriele, wearing a light grey suit and looking pale but smiling often, did not speak at the first session. He is expected to testify when the trial resumes on October 2.