Attorney General William Barr accused special counsel Robert Mueller of failing to investigate evidence that British ex-spy Christopher Steele’s salacious and unverified dossier may have been compromised by a Russian disinformation campaign.

In an interview Thursday with Catherine Herridge of CBS News, which followed the Justice Department’s move to drop its Mueller spinoff prosecution of former Trump national security adviser Michael Flynn, Barr was asked to comment on how recently declassified footnotes from DOJ Inspector General Michael Horowitz’s report on the FBI’s Russia inquiry “suggest that the Steele dossier was likely the product of Russian disinformation” and that “there were multiple warnings to the FBI at that time, yet they continued to use that.”