Margaret Schilling, a patient at the Athens Mental Asylum disappeared 30 years ago. Her lifeless body was found weeks later in an abandoned ward of the building.
In the spot where she was found there is a white spot in the shape of a human body. This has moved the fantasy of many ghost-story enthusiasts and attracted attention of the media an numerous occasions.
Carolyn Zimmermann and Unige Laskay, chemistry graduate students in the group of Glen P. Jackson at OU decided to look at the spot from a scientific point of view. Here is what was found.