Marion was in a happy, peaceful marriage with her husband Jonah, who hunted regularly. One night, on February 22, 1992, Jonah was killed when Molly McNamara drove her car into him by accident. Both of them died. Marion was grief-stricken, and after burying Jonah's body at a spot marked by a tree, Marion hanged herself inside the attic of their house.
15 years later, Sam and Dean Winchester investigated the hauntings caused by Jonah and Molly upon the highway. The brothers discovered Marion's corpse, and chose to bury her out of respect.