Year three: alleged killer on the loose but nobody gets hurt

I mean, several students get attacked by a werewolf and 100 dementors in the same night, nearly resulting in 3 people (2 of them students) losing their very souls. And of course, poor Draco maimed by Buckb- uh… I mean, Witherwings.

Year five: strangely, no attacks on the school

That’s a very diplomatic way to skirt around the governmental coup of the school implementing totalitarian control by a racist megalomaniac, restricting basic rights, turning students into secret police, and punishing discent with literal fucking torture.