When I was 18/19 in college, I met a guy through my brother’s work that was in his mid 40’s. We hung out with him and his girlfriend a lot and he was pretty good friends with my brother. He even met my mom and family, helped her with some construction projects she needed done (dad died when I was 15, so she didn’t have that extra help), and was invited to her wedding to my step dad.

Now we knew that this guy was an ex-con (the restaurant my brother worked at hired a lot of ex-cons), but we never really judged or pried into what happened. Honestly, this guy was always just chill, giving, funny, helpful, and respectful. I never got creeped out by him, and i never felt like he was inappropriate with me. We found out through a mutual friend later that this guy used to get paid to bleach the bodies of girls/women that had been raped and killed by others. To this mutual friend’s knowledge, our friend hadn’t actually done any raping/killing, but I was really struggling to feel much comfort in the fact that he “only” helped guys get away with it. Especially because I was a young, petite college girl at the time.

Anyways, I dont directly know of anybody ive met that has killed someone, but the fact that I know of somebody that did this horrible thing makes me think that you’re correct.