A federal judge in Washington heard arguments for more than two hours Monday over whether a fuller version of Robert Mueller’s report on the Russia investigation should be released, as the U.S. Justice Department pressed for continued secrecy around what the government considered to be particularly sensitive portions of the 448-page document.

U.S. District Judge Reggie Walton of the District of Columbia appeared skeptical at times of the Justice Department’s arguments against unveiling portions of the blacked-out sections of Mueller’s report, suggesting that additional transparency could shed light on how the special counsel’s office decided to bring or forgo prosecutions.