Sam Beckett from quantum leap has 7 PhDs if i remember correctly. Fictional of course but still. Why do that? One of which is in music i think. Could be misremembering.
The image of the evil genius serial killer is mostly a Hollywood invention. Real serial killers generally do not possess unique or exceptional intellectual skills. The reality is that most serial killers who have had their IQ tested score between borderline and above average intelligence. This is very consistent with the general population. Contrary to mythology, it is not high intelligence that makes serial killers successful. Instead, it is obsession, meticulous planning and a cold-blooded, often psychopathic personality that enable serial killers to operate over long periods of time without detection.
More realistically, the reason serial killers are so hard to catch, is because it is a crime without any motivation. It coul've been done by anyone. Because it makes no sense.
If we're talking about the same guy, he had to manage the economy of a country that has been constantly been fucked up by it's government. That probably also contributed to his fascist ideas.