At the end of the day, a policeman parked his van in front of the station. As he was gathering his equipment, his dog started barking. The policeman looked up to see a puzzled looking little boy.
"Is that a dog you have back there?"
"Yes, it is," said the policeman.
"
What'd he do?"
"Is that a dog you have back there?"
"Yes, it is," said the policeman.
"
What'd he do?"