It's a cheap emotional play for script writers to use torture as a device to extract information. It's wrong, it doesn't work in practice, and it needs to stop in the real and fictional worlds.
It does not matter who is involved. I know that this is the Castle-world, in which people involved with a victim in a case is allowed to work on the case. But it is exactly in this kind of situation that we show our true selves.
Just a few episodes before, Beckett showed herself to be a hero, putting justice above her emotions. Castle is never THE hero of the show, but Beckett in allowing him to do what he did is just as bad.
It does not matter who is involved. I know that this is the Castle-world, in which people involved with a victim in a case is allowed to work on the case. But it is exactly in this kind of situation that we show our true selves.
Just a few episodes before, Beckett showed herself to be a hero, putting justice above her emotions. Castle is never THE hero of the show, but Beckett in allowing him to do what he did is just as bad.