How about contacting one of those projects run out of law schools, that tries to bring justice to people without resources and who have been unfairly accused? They are called things like "the innocence project." It seems they usually work on cases where they believe people were wrongly convicted, but what you describe sounds like a travesty of justice also, and these projects seem to really like to expose flaws in corruption in the system. If they don't take on this kind of case, maybe they would have advice on where to turn.
http://www.innocenceproject.org/

Best of luck to you and your wife.