U.S. District Judge Marianne Battani said she wants to know the details that did not appear in an affidavit used to obtain a search warrant.
Investigators last month spent days digging up a horse farm in Milford Township outside Detroit looking for Hoffa, who vanished from a restaurant parking lot in 1975.
The Detroit Free Press Friday published the affidavit, which it obtained through a Freedom of Information lawsuit.
The Free Press wants the government to unseal a confidential memo that details all of the FBI's evidence in the Hoffa case, but government attorneys argue that because it's an ongoing investigation, the information should remain confidential.
Celebrity Breakups and divorces of 2014 [PHOTOS]