I was once reading about former serial killer Ted Bundy. He had actually had a degree in psychology and even took a job at Seattle's Suicide Hotline crisis center.
He was also accepted into the law schools, reommended by several UW psychology professors.
And then this doctor actually killed his patients:
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Not really creepy. That's exactly why they were so successful and dangerous. There is actually an observed abnormality in criminal IQ where you see the criminal IQ below the average on all levels, but then as the end of the bell curve comes along there is a massive jump.
In reality, morality and adherence to those morals is just another trait.1