A relative by marriage went to prison for shaking and killing his baby. This was 30 or so years ago, I only met him once as a young child. Not to excuse his actions but he had a very chaotic upbringing, was in children's homes, into drink and drugs from 12 or 13. Never really had a proper family or any actual parenting. He died in prison a few years later.
I went to primary school with someone who used to torture insects and small animals for fun. I wouldn't have been at all surprised if he'd turned out to be a murderer.
One of my secondary school teachers was really unpleasant. Used to encourage boys to lie on the floor to look up our skirts, how to cop a feel when using equipment etc.
bleeping grim. He left suddenly one day and was never mentioned at school again. Turned out he was arrested for abusing his own children and being part of a pweirdo ring.
Oh, I also know someone whose ex-husband is a convicted violent rapist. He only served about 8 years, is out now. Still sees his kids from 1st marriage and recently remarried. I do wonder if his new wife knows. That said everyone else around him just treats it like it's no big deal, like he stole someone's wallet