A federal judge on Thursday assailed U.S. Attorney General William Barr’s rollout of a report summarizing the special counsel investigation into Russian interference in the 2016 presidential election, saying the Justice Department leader’s statements raised “grave concerns” about the process leading up to the document’s public release last year.

U.S. District Judge Reggie Walton of the District of Columbia said he will conduct an independent review of former Special Counsel Robert Mueller III’s report to determine whether the Justice Department had properly redacted, or blacked out, portions of the more than 400-page document ahead of its public release last year.