The cardinals were given a broad mandate to interview Vatican officials across the board to get to the bottom of the leaks and report back to the pope. They are working separately from a criminal probe headed by the pope's top bodyguard, a former Italian secret service agent who heads the Vatican police force.
So far only one person has been arrested in the case: the pope's butler, Paolo Gabriele, a 46-year-old father of three has been accused of aggravated theft after reams of papal documents were found in his Vatican City apartment.
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