Hill v. McDonough, 547 U.S. 573 (2006), was a United States Supreme Court case challenging the use of lethal injection as a form of execution in the state of Florida. The Court ruled unanimously that a challenge to the method of execution as violating the Eighth Amendment to the United States Constitution properly raised a claim under 42 U.S.C. § 1983, which provides a cause of action for civil rights violations, rather than under the habeas corpus provisions. Accordingly, that the prisoner had previously sought habeas relief could not bar the present challenge.