I disagree to some extent. I’m not sure if you have been in college in the United States lately but there are MANY MANY people his age and older still attempting bachelor degrees. I don’t think 28 is old or out of the norm for a graduate degree. If anything, more the norm. Are there some young kids who graduate sooner, sure, but many do not. I think his age is of no significance to his level of intelligence. I do not doubt this man is intelligent either. He surely is! Probably above average, but it is the lack of social norms that sets him aside from others. One can be exceedingly intelligent but lack the ability to match the “street smarts” or “common sense” that some maybe less intelligent people have. Without both of those, he will surely make mistakes in his logic. I agree that he is clearly a narcissist and believes himself to be smarter than others. I know someone who has similar narcissistic qualities, and these types of people do not fear authority. They actually love the challenge and look for opportunities to flaunt how smart they are.
Regarding the math and science? Both would be requirements for his bachelors and masters programs. So to get his bachelors degree, he would be required to complete statistics of psychology, for example. Once in the graduate program. He would be required to do the same again but for the criminology program - each class studying statistics, but based on the subject being learned. These are requirements for degrees here in the US.