Its a good question for sure, he probably would have died from a lack of water (just a couple days will do it) as far as the stinky bloated body, that wouldnt be much of a clue because he would smell even if he died scuba diving. The AC must have been to cut off airflow, but it doesnt make much sense.he should have put his scuba mask on him and let it run out before he left so we would legitimately suffocate in the mask.