Officer Murdock and Officer Kilroy

1) In panel two, the policeman is saying, "Look here, sir, does your dog have a concealed weapon permit for that tooth?"
2) The police car in panel one got a gold star for attendance. The police car in panel two got a gold star on its spelling quiz.
3) In panel two, the cat has called the police to file charges against the dog for stalking. In panel one, the dog has called the police to file charges against the man for his mustache. It's just wrong.
4) In panel one, the policeman's partner waiting in the car is a midget. In panel two, the policeman in the foreground is on the beat with Officer Kilroy.
5) The policeman in the foreground in panel one has a see-through visor, so even though you can't see his eyes, he can see you. The policeman in panel two is blind and identifies suspects by echolocation.
6) The cat in panel one is named Marmalade. The cat in panel two is also named Kilroy.