The bipartisan House Ethics Committee is expected to detail scathing allegations into former Rep. Matt Gaetz, writing in a draft report obtained by ABC News that the committee found “substantial evidence” that he had sex with a 17-year-old in 2017 in violation of Florida’s statutory rape law, and engaged in a broader pattern of paying women for sex.

The draft committee report also revealed evidence of illegal drug use, acceptance of improper gifts, granting special favors to personal associates, and obstruction, after Gaetz refused to comply with subpoenas and withheld evidence from the committee.

A woman testified to the committee that Gaetz had sex with her in 2017, when she was 17 and had just completed her junior year of high school. Identified only as “Victim A” in the draft report, the woman told investigators she received $400 in cash from the then-Congressman that evening, “which she understood to be payment for sex,” according to the report.

Gaetz on Monday filed a lawsuit against the Ethics Committee in an effort to stop the committee from releasing its report.

“This action challenges the Committee’s unconstitutional and ultra vires attempt to exercise jurisdiction over a private citizen through the threatened release of an investigative report containing potentially defamatory allegations,” the filing from Gaetz says.

Gaetz in the filing asks the court to issue a temporary restraining order and a preliminary injunction to block the release of the report or any findings, which he says would cause “damage to [his reputation and professional standing” that would be “immediate and severe.”

“The threatened release of information believed to be defamatory by a Congressional committee concerning matters of sexual propriety and other acts of alleged moral turpitude constitutes irreparable harm that cannot be adequately remedied through monetary damages,” the filing states.

Gaetz’s lawsuit highlights that he is now a public citizen and claims he did not receive “proper notice” of the report’s impending release.

“After Plaintiff’s resignation from Congress, Defendants improperly continued to act on its investigation, and apparently voted to publicly release reports and/or investigative materials related to Plaintiff without proper notice or disclosure to Plaintiff,” the complaint states.

Gaetz has repeatedly denied any wrongdoing. Following indications last week that the committee would release its report, Gaetz took to X in a lengthy post, writing in part that when he was single he “often sent funds to women” he dated and that he “never had sexual contact with someone under 18.”

“It’s embarrassing, though not criminal, that I probably partied, womanized, drank and smoked more than I should have earlier in life. I live a different life now,” he posted. “I’ve never been charged. I’ve never been sued. Instead, House Ethics will reportedly post a report online that I have no opportunity to debate or rebut as a former member of the body.”

The Justice Department declined to charge him last year after a yearslong investigation into similar allegations.

President-elect Donald Trump last month tapped Gaetz to serve as attorney general in the incoming administration, and Gaetz resigned his congressional seat shortly after. But Gaetz subsequently withdrew his name from consideration, saying his confirmation process was “unfairly becoming a distraction to the critical work of the Trump/Vance Transition.”

The Ethics Committee was in the final stages of its probe into Gaetz when Trump tapped him for attorney general. The committee generally drops investigations of members if they leave office, but Gaetz’s resignation prompted a fiery debate on Capitol Hill over whether the panel should release its report to allow the Senate to perform its role of vetting presidential nominations.

The committee initially voted against releasing the report before reversing course, sources said.