My students and I worked along with Jerry Mitchell and the Chaney and Schwerner families to get the case reopened. Our website: http://www.mississippiburning.org details that torturous process.
We came away with great respect for Attoney General Hood and his staff. They were sincere, hard working, and committed. However, we also were mystified by the decision to charge Killen only. There are others alive who were involved ad could be charged.
If you'd like to learn a less well known story of the era, please also check out our website at http://www.clydekennard.org