Author: Archie Goodwin
Art: Al Williamson
Creepy #112 (August 1979)
Reprinted in Creepy #137 (May 1982)
This is a story I was incredibly fortunate enough to see the original art to when I visited Al Williamson in October of 1998.
Al mentioned that Bruce Jones scripted the original concept (if I am remembering correctly), but after Al drew it he felt something was missing and shelved it. Al then talked to his good friend Archie Goodwin about it and Goodwin offered to rewrite it (changing the focus and making it much darker than the original).
It is one of my favorite Goodwin/Williamson collaborations.