A history of bad decisions just about sums this up. He's demonstrated his poor decision making skills time after time and has even gone to prison for it. He sentenced himself and his step son to death for the crime of combining delusions, ignorance and stupidity. It's been asked what can be learned, and his instance the answer is nothing. He's dead. He knew that he should get certified to dive in caves and he chose to ignore the rule. Was it finances? Was it a sincere belief that training was not needed? We'll probably never know. We only know that he broke the rules and paid the ultimate price and took someone else with him.