Maybe it's a cultural thing, but I had the impression from the news that it happened in the US as well. As may be, in this country we have had a distressing number of cases where someone has reacted to his (it's invariably a man) partner leaving, or threatening to leave, by killing her and their children. (One was literally just down the road from our house.) That is, to make it perfectly clear, the children of himself and the departing spouse. I repeat, I doubt very much whether you will find any non-human parallel to such counter-evolutionary behaviour.