The bomb
I could kinda sorta see how if you spend way, WAY too much time watching TV you could mistake a kid's homemade digital clock for a bomb. That's almost understandable. I mean, not really, it's pretty stupid, but hey, let's give the benefit of the doubt, okay.
The part I don't understand is how when you realize your mistake -- which is easy to do because it's, you know, a circuit board in a pencil case, no explody bits; plus the kid is right there telling you it's a clock -- instead of sending him back to class and maybe even apologizing to him, you call the police, have the kid cuffed and perp-walked out of the school, search and interrogate him (with no lawyer, no parents, not even a phone call), "threaten to expel him if he didn’t make a written statement", suspend him for three days, and publicly announce you may still have him charged with "making a hoax bomb". That part makes no goddamn sense whatsoever.
Unless the kid's dad is a politically active muslim. Then it becomes easier to find the explanation.