I’ve heard several investigators refer to him as a high I.Q. perp. He was smart enough to amass a fortune and was also a former employee of Lockheed-Martin working on equipment for NASA,
Smart in some areas does not mean he had common sense.
One of the most intelligent individuals I know did not even know how to hook up battery cables to jump start his car.
I’m pretty sure that he was an accountant.
I believe he was an auditor .... which does require brains but is not the same as an advanced engineer or scientist
I thought he was an auditor.