Doonesbury by Garry Trudeau for June 20, 1973
Cop: O.K., fellahs, set your bags right down over here... Zonker: What's this all about? What did we do? Cop: Routine border check. Just gonna have man dog Claude here check you out... see if he smells somethin' funny... Hey! What is it, boy? What is it? You're on to somethin', eh, boy? Right? Right? Dog: J'accuse! Zonker: Hey! No way, man! I'm clean!