IANMTU, had a family member who worked with a serial killer (unaware) and after the apprehension, the authorities really pestered him with questions about all aspects of the guy. At work, he was totally normal. The guy gave no indication at all he was recreationally killing women.
The authorities were particularly interested if the guy had ever talked or hinted of any other place he had been at any time, vacations, business trips, etc, but the guy was VERY skilled at his 'hobby', and left very few clues about anything.
The authorities were particularly interested if the guy had ever talked or hinted of any other place he had been at any time, vacations, business trips, etc, but the guy was VERY skilled at his 'hobby', and left very few clues about anything.