Top Mueller prosecutor: Barr caught in a lie about Russia investigation

One of former special counsel Robert Mueller's top prosecutors believes Attorney General William Barr was caught making a "false statement" about the Russia investigation.

Andrew Weissmann, who was known as Mueller's "pit bull," told MSNBC that a House Democrat cornered Barr during the House Judiciary Committee on Tuesday into admitting the White House did not fully cooperate with the special counsel investigation as he had claimed more than a year ago.

"I thought Rep. Neguse did a phenomenal job in cornering the attorney general in what I think is going to come out of this is something that really is a false statement. He said, 'You said in a press conference that the White House fully cooperated in the Mueller investigation,' and the attorney general would not repeat that under oath. He said, 'No, no, what I really meant was fully cooperated only with respect to document production,'" Weissmann said.