As a slightly late follow up to a previous post a good while back, my next-door neighbor I grew up over the fence from has now been sentenced to second-degree murder as well as interfering with a body.
She killed her abusive boyfriend in his sleep, hid his body for months as she slowly dismembered him and distributed his remains to various areas of the city.
Considering how kind and polite I remember her to be, it only goes to show that anyone can have it in them.
https://globalnews.ca/news/10633653/nanaimo-murder-boyfriend-dismembered/