"The blood stains are still there. They get cleaned but come back." That was the story told while investigating this alleged haunted locale in eastern Oklahoma. Said to be the site of cruel and senseless violence decades earlier.
In the darkened site the spots were pointed out and a photo taken (with a camera strap in the image for some scale).
The color of the spots was a deep rust and could have been blood...or paint.
The problem with these types of claims is the lack of any ability to verify - through testing using scientific means - if they are true blood stains forever stained into the wood or something more benign.