Three Nephites protect missionaries from a serial killer
Hard to prove
There are hundreds of Mormon folklore stories that involve the Three Nephites. Most stories include old white bearded men helping strangers. The bearded men just suddenly dissappear and are never seen again. My favorite Nephite story also involves a serial killer.
This story usually has sister missionaries knocking on the door of a serial killer not realizing the danger they are in. They speak to the man for a few minutes, trying to convince him to let them in to speak more about the Book of Mormon. He is very short with them and turns them away.
A few days later the authorities capture the serial killer (it is often a well-known killer like Jeffery Dahmer). Somehow the police know that he had the chance to kill the sister missionaries and asks why the serial killer did not allow them into his house. The serial killer says, “I was scared of the three huge Indian warriors that were standing behind them.”