C, the law used to detain U.S.-born citizen Juan Carlos Lopez-Gomez, was used to arrest more than a dozen other people.

Attorney General James Uthmeier’s office, in a 22-page court document filed Tuesday, disputed that the law improperly encroaches on the federal government’s authority to enforce immigration laws.

Gomez, arrested at a traffic stop, was held for 30 hours per ICE request despite proof he was born in Georgia. Here's what to know.