Doonesbury by Garry Trudeau for November 19, 1991
Transcript:
Rick: You know I've been thinking I ought to try to get in touch with Brett Kimberlin. He might know something about this... Joanie: Who's Brett Kimberlin? Rick: A convict who's suing the government for trying to slience him. He claims he sold marijuana to Quayle on 15 or more occasions. Joanie: Marijuana? But you said Quayle was investigated for buying cocaine. Rick: Yeah, but the case was in Indiana, where Kimberlin is from. Maybe there's a connection. Joanie: I can't believe we're talking about a Vice President. Rick: Well, they're the ones with too much time on their hands.
This arc was written in 1991. I don’t know what Quayle did or didn’t do; but, had the arc been written 1996, or later, the content may have changed:
https://en.wikipedia.org/wiki/Brett_Kimberlin#Dan_Quayle_marijuana_charges