A penniless merchant had a strange dream. A monk appeared and said, "I am money earned by your ancestors. When you see me tomorrow, kill me and take the money."
The next day, a monk came to the merchant as the dream foretold. When the merchant clubbed him to death, the monk turned into a heap of gold coins.
The merchant's neighbor happened to see this. He grabbed a club and went to the monastery where he attacked the monks. Some died, some were wounded; none turned into golden coins.
The police arrested the man for murder and hanged him.
Inspired by: The Panchatantra, translated by Arthur Ryder.
Notes: It is in Book 5, Story 1. In the original story, the witness is a barber who happened to be at the merchant's house, but I made it just a neighbor instead.