I have a student that is defiant and today he was in trouble in another class, was asked to go to the office and did so. After five minutes of waiting at the office, he came back to my room. I asked him if he had spoken with the principal. He claimed she wasn't in the office. He was upset! He was asked earlier to stay in at recess to complete late work and he stormed out the door. I called the office for assistance. What do I do? He gets away with this a lot.