Established by District Attorney Craig Watkins in July of 2007, the Conviction Integrity Unit reviews and re-investigates legitimate post conviction claims of innocence in accordance with the Texas Code of Criminal Procedure, Chapter 64 (Motion for Forensic DNA Testing). In addition, the Conviction Integrity Unit reviews and prosecutes old cases (DNA and non-DNA related) where evidence identifies different or additional perpetrators. Special Field Bureau Chief Russell Wilson supervises the Conviction Integrity Unit, the Appellate Division, the Public Integrity Division, the Federal Division and the Mental Health Unit, as well as public information, evidence destruction and expunctions at the District Attorney’s Office. The Conviction Integrity Unit is staffed by two assistant district attorney, one investigator and one legal assistant. This special division is the first of its kind in the United States.