What part of TN? I also live in TN. Ther eis a good forensic program in north GA:
http://www.kennesaw.edu/coned/sci/index.htmIf you have expereince, you can take some of there classes and get pretty ramped up.
Are you looking for a degree or certifications? If you already have a degree (regardless of what it is in, I would go the cert route first. then top it off in acedemia. Just my two cents.