Roughly speaking Fumitaka Kohiruimaki, a former detective, explains the IV drip excrement contamination incident that occurred in Kashiwa City, Chiba Prefecture. There is a search history on his smartphone for ``Feces, injection, or death,'' which is considered to be evidence of premeditation. He pointed out that ``the causal relationship between excrement contamination and death will be important'' in future criminal trials. Read article