The department also posted a copy of Hermosillo's sworn statement on X in which Hermosillo responded "yes" when asked if he had entered the U.S. illegally. The document shows a child-like signature that reads "Jose."

In a phone interview Tuesday, Hermosillo's parents told CBS News their son suffers from intellectual disabilities, cannot read or write and has trouble speaking. They said he could not have possibly known what he was signing when he was detained.

"He's never been able to read and was always in special education classes in school," Guadalupe Hermosillo, Hermosillo's mother, said in Spanish.