Sorry but he would be hard pressed to kill himself at Indian since there I 24 hour security living on site and they have the dive schedule of when divers are to be there. He would likely find the inside of Wakulla County jail before the cave and I can't guarantee that wouldn't kill him. No training could prepare anyone for that place.
On the other hand, if you want to seek an answer, I would go with funding a competent diver to speak with. One that actually gets into the situations you ask about and doesn't just follow a gold line in and out. An explorer comes to mind. You know the diver that actually lays the line most others follow?
Being sick sucks. I have nothing better to do then post on CDF!! Life is better when diving and not just talking about it!!

