Mystery Informant

The water smelled of rotting flesh, so much that I have to turn and gag. Putting my hand over my mouth, I look inside the death chambers again. Clues are hard to find, but it appears one of the former bloody occupants left me a message in code. A ring, placed near the drain, a small scratch pointing upward. These things confuse me at first. From the depths of my trench coat I pull out a small camera, so I can review what I have just bore witness to later. Looking higher, I see what appears to be part of the finger that ring once went on. That would explain the putrid scent and color of the water. I put the camera back in the inner pocket, and pull out my notebook as I walk to my car. Writing the address down, I put the notebook away and drive off, waiting until I figure out sense of the clues left behind.