President Trump has claimed that Kilmar Abrego Garcia, the man mistakenly deported to El Salvador in March, is a member of MS-13, the Salvadoran-American criminal gang, and that the tattoos on Mr. Abrego Garcia’s knuckles prove it.

In a post nearly three weeks ago on Truth Social, Mr. Trump’s social media platform, he gave his version of a primer on those tattoos, showing a photo of Mr. Abrego Garcia’s hand, with one small tattoo on each finger: a marijuana leaf, a smiley face with X’s for eyes, a cross and a skull.

Above each of those black tattoos was a letter or a number — M, S, 1 and 3 — in a sans-serif font that clearly had been superimposed onto the photo. “He’s got MS-13 tattooed onto his knuckles,” the president wrote in his post.

In other photos, however, including ones shared by Mr. Abrego Garcia’s wife, Jennifer Vasquez Sura, the letters and numbers do not appear on Mr. Abrego Garcia’s knuckles.

Here’s a close-up view of Mr. Abrego Garcia’s tattoos from one of those photos: