Juan Carlos Lopez-Gomez, a 20-year-old U.S. citizen, was being held in the Leon County Jail Thursday, charged with illegally entering Florida as an “unauthorized alien” — even as a supporter waved his U.S. birth certificate in court.

The man, who was arrested Wednesday after a traffic stop in which he was a passenger on his way to his job in Tallahassee, is set to remain in jail for the next 48 hours, waiting for federal immigration officials to pick him up, even though Leon County authorities dropped his first-degree misdemeanor charge.

His mother, Sebastiana Gomez-Perez, burst into tears at the sight of her son, who appeared virtually for his first hearing at the Leon County Courthouse. She left the courtroom distraught because she could do nothing to help her son, who was born and lives in Grady County, Georgia.

“I wanted to tell them, ‘Where are you going to take him? He is from here,’” his mother told the Phoenix in Spanish moments after exiting the courtroom. “I felt immense helplessness because I couldn’t do anything, and I am desperate to get my son out of there.”