News travels fast, but fake news travels even faster, especially when there’s a political agenda attached to it.

One glaring example took place over the weekend, when someone on Twitter TWTR, +1.62% posted a photograph of an injured police officer, with a caption that he’d been “brutalized” by the migrant caravan on its way to the United States.

Soon, it would spread across the internet, as these things do. Same picture. Mostly the same caption. But, as you can see by these examples, different accounts.

The problem, according to a deep dive from Snopes: It’s not true. The main image, which was taken during a clash in Mexico City in 2012, is just another attempt to demonize the refugees and spread fears over immigration.

You can see the image used in this 2012 story.

“These pictures do not capture police officers who were brutalized by members of the immigrant caravan making its way toward the U.S. in October 2018,” Snopes explained. “They’re all several years old and depict the aftermath of altercations between police officers and protesters in Mexico.”

Snopes wasn’t the only one to point this out, of course:

Nevertheless, plenty believed it. That long list apparently includes Ginni Thomas, wife of Supreme Court Justice Clarence Thomas, who posted it on her page:

Facebook

To be fair, it’s not that hard to get duped on the internet. But before the post was pulled from Thomas’s page on Wednesday, she left it up for days, even as several commenters, including Mike Burkons, pointed out the clear falsehood.

“Ginni, do you even care that the pic you posted isn’t from the caravan and is from 2012?” he wrote. “I hope your husband actually thinks facts are important before he decides a case unlike his wife.”

Facebook FB, +2.12% , according to a statement published by the Washington Post, ultimately responded and took action.

“While it’s something we should have caught sooner, we were able to identify and address duplicate versions of this photo that were being shared elsewhere on Facebook,” the company said. “Thanks to a ‘false’ rating from one of our third-party fact-checkers on this photo, we’ve been able to demote these duplicate posts in News Feed.”

Meanwhile, the president continues to use the caravan to motivate voters on the issue of immigration as the midterms draw closer. Earlier this week, he said the U.S. will do what it takes to keep them out and “will now begin cutting off, or substantially reducing” foreign aid to the countries involved.