As protesters gathered outside the homes of conservative-leaning U.S. Supreme Court justices, a rumor took off on social media that Justice Samuel Alito had moved to an "undisclosed location."

Alito authored a leaked draft opinion that would overturn Roe v. Wade and return authority over abortion access to the states. In the days after Politico published the draft on May 2, protesters for abortion rights showed up outside the Maryland homes of Chief Justice John Roberts and Justice Brett Kavanaugh and, on May 9, outside of Alito’s Virginia residence.

It isn’t proven that Alito was forced to move. But the rumor jumped from right-wing blog sites to anti-abortion activists, Republican lawmakers and the hosts on One America News Network, Newsmax and Fox News, underscoring how quickly unverified information can travel.

"Justice Alito actually had to move his family out of town," Fox News host Laura Ingraham said on her show May 9. "My friends, this is what happens in third-world countries, not in America."

"This was enough to force Justice Alito and his entire family into hiding," Fox News host Jesse Watters said three hours earlier on his own show. "They have moved now to an undisclosed location."

But though it was widely repeated as fact in right-wing media, the rumor that Justice Alito and his family had to be whisked away to an "undisclosed location" ahead of protests outside his house has not been corroborated.

The person who appears to have driven the rumor into the mainstream, attorney Ilya Shapiro, said he cannot remember where he first heard it.

"Like everyone who works in constitutional law, I talked to a lot of people about the leak last week," Shapiro told PolitiFact in an email. "I don’t recall who told me about Alito’s heightened security protocol, but wouldn’t be able to reveal that source without permission regardless."

The Supreme Court and the U.S. Marshals Service, which is providing additional security for the justices, did not respond to requests for comment.

But there was reason to question the veracity of the rumor even before hosts like Watters and Ingraham spread it further.

U.S. Supreme Court police stand outside the home of Justice Samuel Alito on May 5, 2022, in Alexandria, Va. (AP)

Hours before Watters went on air for "Jesse Watters Primetime," Politico traced the rumor back to Shapiro. Shapiro was the former vice president of the libertarian Cato Institute before moving to Georgetown Law as executive director of the Center for the Constitution and a senior lecturer. He was recently placed on administrative leave from his new role at Georgetown over tweets he sent about the nomination of a Black woman to the Supreme Court.

In a May 5 interview with WMAL radio, Shapiro said he had "heard a rumor that Justice Alito and his family have been taken to an undisclosed location."

Shapiro said the same May 7 on Fox News: "I’ve heard that Justice Alito has been taken to an undisclosed location with his family." 

Several outlets and media personalities, including Watters, repeated Shapiro from there.

Later on May 7, Breitbart News published a story headlined, "Justice Alito moved to undisclosed location," citing "reports around D.C." The conservative website later altered its headline and changed the text of its story to cite "rumors around D.C." and linked directly to Shapiro’s two interviews with WMAL and Fox News.

Townhall, another conservative outlet, ran a similar story, as did the Gateway Pundit and the Western Journal. The Post Millennial and Alex Jones’ InfoWars posted stories based solely on the Breitbart article.

Republican Sens. Ted Cruz of Texas and Mike Lee of Utah shared the Townhall story, while former Trump aide Sebastian Gorka promoted the Breitbart piece to his nearly 400,000 followers on Instagram. Anti-abortion activist Kristan Hawkins, the president of Students for Life of America, tweeted, "Justice Alito and his family have been moved to an undisclosed location."

On Fox Business Network the morning of May 9, the Heritage Foundation president Kevin Roberts repeated the claim to host Maria Bartiromo. Several hosts on Newsmax did the same, according to TVEyes, a media monitoring service.

One Newsmax video promoting the unproven claim racked up thousands of views on Facebook, where it was flagged as part of Facebook’s efforts to combat false news and misinformation on its News Feed. (Read more about our partnership with Facebook.)

But when Politico followed up with Shapiro by mid day on May 9, Shapiro said he couldn’t remember the exact source for the information. He told the Washington Examiner the same.

"I forget whether I saw the rumor on Twitter or somebody told me," Shapiro told Politico, which published the quote at 1:10 p.m. EST. "I don’t know."

Despite Shapiro’s admission, the rumor was floated again hours later, on both Fox News and Fox Business Network and also on One America News. 

"I think Alito had to leave his house," Watters said during "The Five," before repeating the claim later on his primetime show. "He’s in an undisclosed location."

Fox News did not respond to a request for comment.

Alito did deliver a video message to a recent legal conference in Nashville that he was scheduled to attend in person, according to Politico and the Washington Post.

More protests outside of his and other justices’ houses are planned, even as they have drawn backlash, particularly from Republicans. The group Ruth Sent Us, named for the late Justice Ruth Bader Ginsburg, promoted "walk-by Wednesday" demonstrations for May 11 outside the Republican-appointed justices’ houses.

White House press secretary Jen Psaki tweeted ahead of the May 9 protests at Alito’s house that President Joe Biden "​​strongly believes in the Constitutional right to protest. But that should never include violence, threats, or vandalism. Judges perform an incredibly important function in our society, and they must be able to do their jobs without concern for their personal safety."