The Innocence Project, established in clinics and law schools throughout the United States, assists prisoners who seek to challenge their convictions based on DNA testing of evidence. Project members provide free assistance to inmates who have viable claims of innocence and for whom DNA analysis of evidence can yield conclusive proof of innocence. They also provide courses on investigating and bringing to court post-conviction claims of innocence, and work on both state and national levels to develop legislation allowing easier access to post-conviction DNA testing.