Crazilized Person

A person who is crazy but can control their psychotic attitude and pretend to be civilized.
It's almost impossible to spot the difference between a crazy and a norm, the only difference is when their alone, they are a demon lurking in the shadow

Person 1:Omg you won't believe what I just saw
Person 2: what?!?
Person 1: I just saw person 3 kill a cat!
Person 2:Omg! He's not that crazy! He's never acted out of the sort before
Person q: He can't be.....a Crazilized person!