Jim Harold's Crime Scene: What motivates a serial killer?

What is it that motivates a serial killer to take human life? And was there something specifically in the life of John Eric Armstrong that led him down that path? Are there ways we can “prevent” serial killers nowadays? 

Interesting discussion with Jim Harold’s Crime Scene posted recently:

🔗 https://jimharold.com/the-baby-doll-serial-killer-jim-harolds-crime-scene-220/

Thanks again, Jim!