A Mexican woman who claims her five-day detention at a federal immigration office was an illegal arrest filed the first lawsuit challenging enforcement of Arizona’s landmark immigration enforcement law.

Opponents of the 2010 law have already filed lawsuits that questioned the constitutionality of the law’s provisions, but Thursday’s filing by Maria del Rosario Cortes Camacho marks a new type of challenge that alleges constitutional violations in how a police agency enforced the law.

Cortes, a domestic violence victim who had applied for a visa allowing her to remain in the U.S. to assist authorities with the case, alleged two Pinal County sheriff’s deputies had unreasonably prolonged the length of a September 2012 traffic stop that was prompted by her cracked windshield. She also accuses the officers of making an illegal arrest by bringing her in handcuffs to a Border Patrol office about 13 miles away where she was detained for…