Why do people watch true crime?

I remember once in high school I walked by a car a truck actually on my way home from school and a man asked me for directions. When I got close to his truck he opened his door and got half way out. I stopped and backed away and told him I couldn't help him. I didn't know where the court house was anyway. I just knew it was down town. But my instincts kicked in. He wanted me to show him on a map. I think he should have went into a gas station and asked for directions or something. I was like 15.