During this scene, Christopher has just found his neighbor's dead dog. I think that Christopher was calmer then most people would be in this situation. He sat down with his dog when the dog's owner walked out shouting and upset to see this.
In this scene, the police arrive and asked Christopher a bunch of questions which caused him to roll up in a ball on the floor (A comfortable position for him where he feels safe). Christopher accidentally hit the policeman and got arrested for that.
On the way to the police station, Christopher seemed very calm.
In this scene Christopher was interviewed and asked why he hit the policeman and if he killed the dog. While this Christopher stayed surprisingly calm. He really liked the room and how the room was a perfect square
Christopher was also very calm when he was put in jail .
His father can to the police station and the went to an interview room. The policeman said that they would keep it on record that he hit a police officer. At this point Christopher got upest and said that it was an accident.