I remember when this guy was on the news back in the day for all of those murders and attempted murders, he was deemed a sociopath killer. He killed his own friend, at first he had just asked her to go back to a crime scene to retrieve a phone that was dropped their, but the police noticed her and took her in, she ended up snitching, and it was lights out, she caught some lead into her head, no remorse.
https://www.youtube.com/watch?v=osl1tcb5Xh4&t=3s