Couple arrested on suspicion of poisoning their 4-year-old daughter to death; related investigation into death of another relative. Miki was found unconscious at her home that day, and was taken to the hospital, where she later died.

When the Metropolitan Police Department closely examined the body, they detected ethylene glycol, a component found in antifreeze that prevents car engines from freezing, as well as antidepressants. The suspect couple lived with five children, including Miki, and the Metropolitan police Department is investigating the details of the incident, including how she was raising her children.