Sixty-two-year-old Catholic priest Eugene Klein of Springfield, Mo., was indicted on charges of conspiracy to defraud the United States and attempting to prevent seizure of Calabrese’s property. The charges were announced Thursday by the U.S. attorney’s office in Chicago.

Calabrese is serving a life sentence for 13 murders at a federal prison in Springfield, Mo., where Klein is under contract as a chaplain. He owes $4.4 million in restitution to victims’ families.

Prosecutors say Klein and two others planned to pose as interested buyers of the Williams Bay, Wis., home. One would distract the realtor while the others searched for the violin, reportedly worth millions.

It was not clear whether Klein had an attorney.