Dr. Christine Blasey Ford, a psychologist. (YouTube)

Note: This story was updated at 12:58 pm.

(CNSNews.com) -- In a signed letter sent to the Senate Judiciary Committee, a former boyfriend of Dr. Christine Blasey Ford contradicts her sworn testimony before Congress last week that she "never" counseled anyone on how to take a polygraph test.

The signed letter by the ex-boyfriend is legally binding, which means that if he lied, he faces a felony penalty of up to five years in prison, explained a spokesman for the Senate Judiciary Committee.

In the letter to the committee, the ex-boyfriend -- whose name is redacted -- states that he was "in a relationship with Dr. Ford" from "approximately 1992 to 1998." They had first met in 1989 or 1990.

"During some of the time we were dating, Dr. Ford lived with Monica L. McLean, who I understood to be her life-long best friend," he writes. "During that time, it was my understanding that McLean was interviewing for jobs with the FBI and the U.S. Attorney's Office."

"I witnessed Dr. Ford help McLean prepare for a potential polygraph exam," he states. "Dr. Ford explained in detail what to expect, how polygraphs worked and helped McLean become familiar and less nervous about the exam. Dr. Ford was able to help because of her background in psychology."

This contradicts Dr. Ford's sworn testimony before the Senate Judiciary Committee on Thursday, Sept. 27.

During that testimony, sexual-assault expert and prosecutor Rachel Mitchell asked Ford, "Have you ever had discussions with anyone, besides your attorneys, on how to take a polygraph?"

Ford answer, "Never."

Dr. Christine Blasey Ford being sworn in before the Senate Judiciary Committee, Sept. 27, 2018. (YouTube)

The questioning continued,

Mitchell: "And I don’t just mean countermeasures, but I mean just any sort of tips, or anything like that."

Ford: "No. I was scared of the test itself, but was comfortable that I could tell the information, and the test would reveal whatever it was going to reveal. I didn’t expect it to be as long as it was going to be, so it was a little bit stressful."

Mitchell: "Had — have you ever given tips or advice to somebody who was looking to take a polygraph test?" [Emphasis added.]

Ford: "Never." [Emphasis added.]

Mitchell: "Okay. Did you pay for the polygraph yourself?"

Ford: "I don’t — I don’t — I don’t think so."

Mitchell: "Okay. Do you know who did pay for the polygraph?"

Ford: "Not yet, so."

UPDATE: The woman named by the ex-boyfriend as being coached by Dr. Ford is Monica McLean, a former FBI agent. In a statement released to ABC News today, McLean said, “I have never had Christine Blasey Ford, or anybody else, prepare me, or provide any other type of assistance whatsoever in connection with any polygraph exam I have taken at any time." Also, a lawyer for Dr. Ford said she "stands by her testimony."

UPDATE: Monica McLean, who reportedly is a "long-time, close friend" of Dr. Ford's, signed onto a Sept. 17 letter with other ladies from the Holton Arms Class of 1984. "We stand with our friend Dr. Christine Blasey Ford and admire her honesty and resolve on behalf of our nation," states part of the letter.

In his letter to the Senate Judiciary Committee, Dr. Ford's former boyfriend further stated, "While visiting Ford in Hawaii, we traveled around the Hawaiian islands including one time on a propellor plane. Dr. Ford never indicated a fear of flying. To the best of my recollection Dr. Ford never expressed a fear of closed quarters, tight spaces, or places with only one exit. I assisted Dr. Ford with finding a place to live in [redacted] CA. She ended up living in a very small, 500 sq. ft. house with one door."

The former boyfriend also wrote that in all the time he knew Dr. Ford, she "never brought up anything regarding her experience as a victim of sexual assault, harassment, or misconduct. Dr. Ford never mentioned Brett Kavanaugh."

In an Oct. 2 letter to Dr. Ford's attorneys, Senate Judiciary Committee Chairman Chuck Grassley (R-Iowa) requested several documents that have not been turned over to the committee, including Ford's complete polygraph examination results and all audio and/or video of her polygraph test. Grassley also mentioned the statement from the ex-boyfriend.

"The full details of Dr. Ford's polygraph are particularly important because the Senate Judiciary Committee has received a sworn statement from a longtime boyfriend of Dr. Ford's, stating that he personally witnessed Dr. Ford coaching a friend on polygraph examinations," wrote Grassley.

"When asked under oath in the hearing whether she'd ever given any tips or advice to someone who was planning on taking a polygraph, Dr. Ford replied, 'Never,'" wrote Grassley. "This statement raises specific concerns about the reliability of her polygraph examination results. The Senate therefore needs this information."