Staughton Lynd, who has written a book asserting none of the five is Vallandingham's killer, said the state has yet to accept its share of the responsibility in the uprising so that justice can be served and conditions improved.

NPR: Mood Tense On 20th Anniversary Of Ohio Prison Riot

Historian-lawyers Staughton and Alice Lynd, a husband-and-wife team who have spent the past 20 years investigating circumstances surrounding the riot, are marking the anniversary with lectures around the state focusing on the five inmates sentenced to death for their roles in the riot.

NPR: Mood Tense On 20th Anniversary Of Ohio Prison Riot