The Ghost of Black Jack Ketchum

Thomas "Black Jack" Ketchum was the only person ever hanged in Clayton, New Mexico. He was also the only man ever hanged for train robbery in the entire state, a law that was later found to be unconstitutional. But, a little too late for poor Black Jack. Remembering his experience long ago, a gentleman tells a story of meeting Black Jack Ketchum while camping at the Philmont Scout Ranch.

The rest of the tale at the source

This story is so interesting in that the apparition seemed to be reliving a battle already passed, and yet was able to see and interact with the boy. Very strange.