Wisconsin Petition for Writ of Habeas Corpus by a Person in Federal Custody — 28 U.S.C. Sec. 2241 is a legal mechanism that allows someone in federal custody to challenge their imprisonment or detention. This type of habeas corpus petition, filed pursuant to 28 U.S.C. Sec. 2241, is used to challenge the legality of a person’s confinement in federal custody, usually because of a violation of their constitutional rights. The petition is filed in the U.S. District Court in the state of Wisconsin, where the petitioner is currently held, and the court has jurisdiction to consider the petition. The two main types of Wisconsin Petitions for Writ of Habeas Corpus by a Person in Federal Custody — 28 U.S.C. Sec. 2241 are the “first habeas corpus petition” and the “second or successive habeas corpus petition.” The first habeas corpus petition is used to challenge the initial detention or confinement of the petitioner, and the second habeas corpus petition can be used to challenge a denial of a prior habeas corpus petition, or to challenge the same confinement on a different basis.