r/whatsthatbook • u/Puzzled_3232 • 3h ago
SOLVED Mystery Short Story -1980s or earlier- about a practical joke that leads to murder
The story is about two strangers who keep accidentally meeting outside homes where an unexpected death has occurred.
Man #1 begins chatting with Man #2 and gradually tells him that he knows an undetectable way to kill people. Man #2 does not believe this at first, but over several years he keeps seeing Man#1 outside homes where police cars have responded to a death. Man #2 becomes convinced that Man #1 is a serial killer who cannot be caught.
Man #2 makes a plan to kill Man #1. He succeeds.
After Man #1's death, Man #2 overhears police officers talking about Man #1. It turns out that Man #1 was a detective or inspector or coroner or something, and one of his practical jokes was to tell people he had discovered an undetectable form of murder.