4-year-old dies from poisoning, likely due to continuous intake of antipsychotic drugs. In March last year, Kenichi Hosoya and his wife Shiho Hosoya drugged their second daughter, Miki, who was 4 years old.
A subsequent investigation revealed that Miki was suspected of having been continuously ingesting this drug for a certain period of time, based on the results of her hair analysis, etc. The Metropolitan Police Department is investigating the details of the incident, including determining when the drug was apparently ingested.