Noem announced an arrest of a 54-year-old man who was living in the U.S. illegally, saying he had written a letter threatening to kill Trump and would then return to Mexico. The story received a flood of media attention and was highlighted by the White House and Trump’s allies.

But investigators actually believe the man may have been framed so that he would get arrested and be deported from the U.S. before he got a chance to testify in a trial as a victim of assault, a person familiar with the matter told The Associated Press. The person could not publicly discuss details of the investigation and spoke to the AP on condition of anonymity.

Law enforcement officials believe the man, Ramon Morales Reyes, never wrote a letter that Noem and her department shared with a message written in light blue ink expressing anger over Trump’s deportations and threatening to shoot him in the head with a rifle at a rally. Noem also shared the letter on X along with a photo of Morales Reyes, and the White House also shared it on its social media accounts. The letter was mailed to an Immigration and Customs Enforcement office along with the FBI and other agencies, the person said.