The House Ethics Committee is questioning witnesses about allegations that Rep. Matt Gaetz used illicit drugs as a member of Congress, multiple sources tell ABC News.

Rep. Matt Gaetz's deposition in a civil defamation case brought by a longtime friend has been moved to June after initially being set for April 5, sources tell ABC News.

Rep. Matt Gaetz has been served a subpoena to sit for a deposition in a civil lawsuit that involves allegations he had sex with a 17-year old-girl, sources tell ABC News.

The Florida congressman could be asked under oath about the allegations involving an underage woman.

The House Ethics Committee has issued a subpoena for the testimony of a former girlfriend of Rep. Matt Gaetz as part of an ongoing investigation.

Joel Greenberg, a one-time close friend of Rep. Matt Gaetz, is cooperating with the House Ethics Committee probe into the Florida congressman, sources tell ABC News.

The House Ethics Committee has reached out to a former girlfriend of Rep. Matt Gaetz seeking an interview amid the committee's ongoing investigation, a source said.

House investigators probing Rep. Matt Gaetz have reached out to Joel Greenberg, a one-time close friend of Gaetz who pleaded guilty to federal charges, sources say.

Rep. Matt Gaetz, R-Fla., succeeded Tuesday where no Republican has before: He nearly single handedly ousted a sitting House speaker.

Florida Rep. Matt Gaetz delivers his remarks after the historic removal of Kevin McCarthy as House speaker.

Matt Gaetz has introduced a motion to remove Kevin McCarthy from the House speakership, setting up a dramatic vote over the future of the chamber's Republican majority

Hard-line Republican Rep. Matt Gaetz on Monday continued to tease introducing a motion to remove House Speaker Kevin McCarthy over his moves to avert a government shutdown.

ABCNL’s Jay O’Brien breaks down Republican infighting over House Speaker

Florida woman arrested for throwing wine at Matt Gaetz

Lawyers for U.S. Rep. Matt Gaetz, R-Fla., said the Justice Department ended its investigation into a sex trafficking case.

The DOJ has informed lawyers representing witnesses that it will not bring charges against Rep. Matt Gaetz after a sex-trafficking probe into the Florida congressman.

Secretary of Defense Lloyd Austin had a fiery exchange with Rep. Matt Gaetz, R-Fla., at a House Armed Services budget hearing.

As the probe into possible sex trafficking allegations against Rep. Matt Gaetz continues, new financial filings show his campaign's fundraising has been dwindling.

Possible witness in sex trafficking probe involving Matt Gaetz takes plea.

Rep. Matt Gaetz's ex-girlfriend was seen entering a courthouse where sources say a grand jury is conducting a sex trafficking investigation involving the congressman.

Former tax collector Joel Greenberg, a one-time associate of Rep. Matt Gaetz, has reached an agreement to pay back Seminole County over $1.8 million in restitution.

Two top DOJ prosecutors were added several months ago to the ongoing federal probe examining sex trafficking allegations against Rep. Matt Gaetz, two sources said.

A judge has agreed to delay the sentencing of former Seminole County tax collector Joel Greenberg as Greenberg cooperates with the probe into Florida Rep. Matt Gaetz.

Florida Rep. Matt Gaetz's one-time wingman has been steadily providing investigators with potential evidence that could implicate Gaetz in a federal probe, sources say.

A new campaign finance report shows how the Florida congressman is spending funds he raised amid the scandal.

As Rep. Matt Gaetz faces a probe into alleged sex trafficking, a campaign disclosure shows how the congressman is spending the funds that he's raised amid the scandal.

The federal probe into sex trafficking allegations involving GOP Rep. Matt Gaetz has engulfed the tight-knit Central Florida political scene, sources tell ABC News.

Former federal prosecutor Robert Mintz explains how the development could bring further scrutiny to the GOP Florida congressman.

A former associate of Rep. Matt Gaetz, Joel Greenberg, pleaded guilty to six of the nearly three dozen charges he faced. He admitted he paid at least one underage girl to have sex with him and others.

Joel Greenberg is expected to plead guilty to six federal crimes, including sex trafficking a minor. As part of his plea deal, Greenberg has agreed to cooperate with federal investigators.

Joel Greenberg, a former tax collector, is set to plead guilty to six federal crimes including sex trafficking of a minor.

Joel Greenberg, a former Florida county tax collector and close friend of Gaetz, is set to plead guilty to six federal crimes, including sex trafficking of a minor.

A one-time close ally of Rep. Matt Gaetz will plead guilty to multiple federal crimes including sex trafficking of a minor and has agreed to cooperate with investigators.

The embattled Florida congressman maintains his innocence after allegations of sexual misconduct, illicit drug use and sex trafficking.

It is the Florida congressman's first public appearance since it was revealed that he's under a federal investigation for alleged sex trafficking.

The House Ethics Committee said Friday it would open a bipartisan investigation into the wide-ranging allegations against Rep. Matt Gaetz.

An associate of Rep. Matt Gaetz who is currently facing sex charges is considering a plea deal that could involve him cooperating with the Gaetz probe, prosecutors said.

During the final weeks of the Trump administration, Rep. Matt Gaetz asked the White House for a blanket presidential pardon that ultimately was not granted, say sources.

The embattled Florida congressman, who is facing a federal investigation for sex allegations, reportedly asked the Trump White House for a blanket presidential pardon.

ABC News confirmed a report that that the Justice Department is investigating whether Florida Rep. Matt Gaetz gave cash or other items of value to multiple women recruited online to sleep with him.

Gaetz previously denied having a relationship with a 17-year-old.

Rep. Matt Gaetz's communications director Luke Ball resigned amid a federal investigation into allegations regarding Rep. Gaetz's sexual relationships.

The Department of Justice is allegedly looking into if the embattled Florida congressman and another politician gave cash or other items of value to women they had sex with.

Sources said the Justice Department started investigating claims about whether the Republican congressman had a sexual relationship with a 17-year-old girl.

The federal investigation into Florida Rep. Matt Gaetz is scrutinizing the congressman's conduct not only in Florida but in other states too, sources tell ABC News.

Conservative rising star Matt Gaetz finds himself gaining attention he didn't seek, as the Justice Department looks into potential violations of sex trafficking laws.

Florida Rep. Matt Gaetz denies having a relationship with a 17-year-old. ABC News' Andrew Dymburt reports.

The Florida congressman insisted he’s done nothing wrong and is the victim of an extortion attempt after new reports that the Justice Department was investigating the alleged relationship.

Rep. Matt Gaetz denied a New York Times report that said he is under investigation for an alleged relationship with a 17-year-old two years ago.