He called the school....they did nothing.
If any guy climbs aboard a school bus and rants that he is going to kill someone because someone is messing with his kid, he should be arrested. What about all the other kids that were not guilty of mistreating this daughter? How do you think it makes them feel to see this guy climb aboard, then hear this guy rant about killing others? I can imagine they feel terrorized.
This guy was completely wrong and he deserved to be arrested and punished.