It is not unheard of for twisted individuals to goad vulnerable individuals, specifically kids/teens, into killing themselves. I don’t have any specific links but in the USA I’m pretty sure I’ve recently read about young men being charged for doing this exact same thing, convincing young girls to kill themselves.

I’m not a lawyer nor do I know the details of this exact case but if it is a similar situation and the parental controls provided weren’t capable of alerting the parents or didn’t stop the communications I can see the parents wining maybe.