Illinois Petition Under 28 U.S.C. 2254 for Writ of Habeas Corpus is a legal document used by individuals who have been convicted of a crime by a state court in the State of Illinois and are challenging the ruling. This document allows inmates to petition the federal court to review their conviction for certain constitutional violations. The petitioner must demonstrate that the conviction was based on an error of law or fact, that the conviction violates the Constitution or laws of the United States, or that the court lacked jurisdiction over the case. The two main types of Illinois Petition Under 28 U.S.C. 2254 for Writ of Habeas Corpus are: 1. Initial Areas Petition: This is the first petition filed in federal court and alleges that the conviction or sentence imposed was in violation of the Constitution or laws of the United States. 2. Successive Areas Petition: This is a petition filed in federal court after a previous areas petition has been denied. It must allege that a new and material fact exists that could not have been discovered earlier and which, if proven, had changed the outcome of the case.