A new Senate committee report questions the credibility of Supreme Court Justice Brett Kavanaugh’s three main accusers, dishing out the worst criticism at gang-rape accuser Julie Swetnick.

The 400-page report by the Judiciary Committee’s Republican staff paints a devastating portrait of Ms. Swetnick. She made the most sensational charges of the women accusers and won airtime on national TV. The report depicts her as dangerous, a serial complainer, a liar, mentally unstable and cruel toward her parents.

It turns out that in one of Ms. Swetnick’s previous sexual harassment complaints she was represented by Debra Katz, the Democratic-connected attorney who took the case of Christine Blasey Ford. The Palo Alto, California, psychologist emerged as the first accuser of Justice Kavanaugh, who ultimately won Senate confirmation on Oct. 5 to the Supreme Court.

Ms. Swetnick’s lawyer was Democratic presidential aspirant Michael Avenatti, a favorite of liberal cable TV shows as a  fierce President Trump critic.

Judiciary Chairman Charles Grassley, Iowa Republican, has sent criminal referrals to the Justice Department accusing Ms. Swetnick and Mr. Avenatti of breaking federal law by submitting false statements.

Mr. Avenatti vouched for a sworn statement from Ms. Swetnick in which she alleged she saw Justice Kavanaugh take part in a gang-rape culture at 10 or more Georgetown Preparatory school parties in the early 1980s. Justice Kavanaugh vehemently denied Ms. Swetnick’s story.