Kotoko finally explains Tanio was actually wishing the police would find something she hid in the swamp years before, and used the body to get police to search the right area. Tanio had been pregnant when she heard Machii committed suicide, and after miscarrying she angrily threw the fetus into the lake. After learning Machii had been framed she desperately wanted to give the fetus a real funeral. The snake accepts this explanation and as they leave Kotoko explains to Kuro that she simply gave the snake the most likely explanation...