It appears that, like me, you’ve interpreted this situation as a “love” triangle: the woman was having an affair with the male teacher, the killer was the woman’s husband or boyfriend.
“Free love” never works out the way visionaries imagine it will ... most people want exclusivity, if only from their partners rather than themselves.
“if only from their partners rather than themselves.”
true, they can mess around but their partner can’t. But the liberal mantra is that having sex is as good as life gets so bang away at will (will is lovin’ it). Like bunnies, or dogs, sex is the ultimate. Completely dulls humanity