...The Antiterrorism and Effective Death Penalty Act of 1996 — or AEDPA — was signed by Bill Clinton in the wake of the Oklahoma City bombing. While it has been mostly absent from the recent debates over the crime policies of the ’90s, its impact has been no less profound, particularly when it comes to a bedrock constitutional principle: habeas corpus, or the right of people in prison to challenge their detention. For 20 years, AEDPA has shut the courthouse door on prisoners trying to prove they were wrongfully convicted. Americans are mostly unaware of this legacy, even as we know more than ever about wrongful convictions. Barry Scheck, co-founder and head of the Innocence Project, calls AEDPA “a disaster” and “a major roadblock since its passage.” Many would like to see it repealed.