The following excerpt is from Samuels v. Copenhaver, Case No. 1:14-cv-00372-DAD-MJS (HC) (E.D. Cal. 2016):
Relief by way of a writ of habeas corpus extends to a prisoner in custody under the authority of the United States who shows that the custody violates the Constitution, laws, or treaties of the United States. 28 U.S.C. 2241(c)(3). Although a federal prisoner who challenges the validity or constitutionality of his conviction must file a petition for writ of habeas corpus pursuant to 28 U.S.C. 2255, a federal prisoner challenging the manner, location, or conditions of the execution of a sentence must bring a petition for writ of habeas corpus under 28 U.S.C. 2241. Hernandez v. Campbell, 204 F.3d 861, 864-65 (9th Cir. 2000).
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