I'm panicking! I have made a big mistake!
Oh no! What did you do?
Well I've killed a kid in my school's bathroom.
That's awful. You should contact emergency services and see if maybe it is not too late. If it is you should admit what you did. It would make you feel better to take responsibilty for your actions.
Nah, I think I'll just drop out of school and hide.
Hiding is not a good option. You will have to live afraid for the rest of your life. And that is only if they don't find you before then and then you might have to face your responsibilities anyways.