An affidavit filed in U.S. District Court on Wednesday says the FBI and U.S. Marshals searched Frank Calabrese Sr.'s home Tuesday. The document says the stash was found in a basement wall, hidden behind a family portrait.

Calabrese is serving a life sentence and has been ordered to pay millions after being convicted in a racketeering conspiracy that included more than a dozen murders.

Calabrese's attorney says he doesn't know who stashed the items, and his client hasn't lived in the home since the mid-1990s. The U.S. Attorney's Office, FBI and U.S. Marshal's Service declined comment.