I've been follow this thread for a while now. It seems to me that there is something hokey going on here. Do these gentlemen have a connection to someone in the Sherrifs/DA's office? I would contact the STATE attorney General's office. See what they have to say. They are your advocate no matter where in the state you live.
With you being able to show all of that evidence, and they aren't even willing to go talk to these guys? There is something going on with the good ole' boy network and you are getting screwed. Get someone involved who is above them in power, and not part of the network.
There are people on the state level who have jurisdiction that can help you. Contact your State Representative, your Senator, and the Attorney General. Make sure you note to them that the local authorities have all been contacted and will not give you due process of law.
Laney