structural:expansion, stylistic:tone, quality:correction, linguistic:paraphrasing
United States

In 1985, the Mexican national Humberto Alvarez-Machain allegedly assisted in the torture and murder of a United States Drug Enforcement Administration (DEA) agent in Mexico. Mexico declined to extradite a Mexican national for the alleged crime committed in Mexico, despite having a treaty of extradition. The United States then hired a private citizen and some Mexican nationals as mercenaries to kidnap Alvarez-Machain and take him to the United States for trial. The trial court ruled that his arrest was unlawful because it violated the extradition treaty. On appeal, in United States v. Alvarez-Machain, 504 U.S. 655 (1992), the Supreme Court held that, notwithstanding the existence of an extradition treaty with Mexico, it was still legal for the federal government of the United States to exercise self-help by forcibly abducting him on a street in Mexico and bringing him to the United States to stand trial. In Alvarez-Machain's subsequent criminal trial, he was acquitted; he later lost a lawsuit against the American government over his wrongful apprehension and imprisonment.