In my story, my characters visit a place where murders occurred several years earlier. My question is how long would the blood stains last on the stone, if no one cleaned it up and it was in an area closed up from weather, moisture, and very few people have gone there since? Could the stone be permanently discolored or would they have gone back to normal after, say, 10 years?
I know it's a strange question, but I want to be accurate.
I know it's a strange question, but I want to be accurate.