Doonesbury by Garry Trudeau for August 11, 1971
August 10, 1971
August 12, 1971
Transcript:
Bob: Alright, Mark, I want you to look at my hippie disguise carefully. Is it authentic? See anything that a real hippie wouldn't wear? Mark: Hmm... Actually, relatively few hippies wear shiny black oxfords.
Seriously, Frank Serpico pointed out that NYPD undercover cops were recognizable from their shoes!