Don't shinigami get punished if they don't do their job or save a human i don't know why he is protecting him but if he continues without a reason then he'll turn into dust
I honesty feel like he didn't do it (maybe I'm wrong) but it's just a gut feeling. people said when a person go throw traumatic event they get certain memories mix up BUT I can be still wrong.
That other guy deserve what he had coming but it still hurts to see him cry like that
Ps fu*k the father