BUSTED: Lawrence O’Donnell unearthed visual proof that ‘pathological liar’ Sarah Huckabee Sanders ‘lied about her lie’
Composite image of MSNBC 'The Last Word' anchor Lawrence O'Donnell and then-White House deputy press secretary Sarah Huckabee Sanders on May 10, 2017 (screengrabs)

MSNBC anchor Lawrence O'Donnell on Friday presented video evidence that White House press secretary Sarah Huckabee Sanders "lied about her lie" when being interviewed by federal investigators.

"It is not news that Sarah Sanders is a pathological liar who works for a pathological liar, that is why as a general rule I do not use video of Sarah Sanders speaking at White House press briefings," O'Donnell noted. "I don't let this program become a delivery system for Trumpian propaganda, which is the only thing that Sarah Sanders traffics in whenever she speaks, wherever she speaks."

"Many Mueller report readers have been just delighted to find that when Sarah Sanders was in effect under oath speaking to Robert Mueller's investigators, she was forced to admit that she lied," he noted. "But that's not exactly what happened."

"Remember, Sarah Sanders is not just a liar, she is a pathological liar. So when she was admitting to the Mueller investigators that she didn't tell the truth, she actually lied to them -- and they knew it," he explained.

The host presented visual evidence of the moment documented in special counsel Robert Mueller's report.

"She was reading a prepared statement about Trump administration news before she took any questions from anyone. There was no heat of the moment. There was no slip of the tongue. She was reading," O'Donnell explained. "She was reading words that she and the team of liars in the White House press office wrote in the cool comfort of their offices."

"That was a lie that she wrote and then very calmly and deliberately read to the news media and to the country. The rank and file of the FBI had lost confidence in their director and then when she was forced under oath to admit that statement wasn't true, she actually lied about her lie," he noted.

As other Trump associates have discovered, lying to federal investigators is a crime that can result in prison time.