Cruz was arrested and charged with breach of peace, a misdemeanor, for bringing a BB/pellet gun to his acting class. It was to be used as a prop in for his acting class.
We don't care why you did it. We don't care that no harm was done. We don't care that you're a productive member of society. We don't care if your record is clean.
You have displeased the Overlords. You must be punished.