Jon Hammar's father says they got back to their Palmetto Bay home Monday afternoon.
Hammar was released Friday from a detention center in Matamoros, Mexico. He was hospitalized over the weekend in Louisiana as he was driving to South Florida. The 27-year-old had a bad chest cold and a stomach ailment before his release.
Hammar was headed to Costa Rica in August when he drove across the Mexican border. U.S. authorities told him he could declare the unloaded shotgun at the border. But reports say Mexican authorities held him until they determined there was no intent to commit a crime.