In a case in which a couple was arrested for killing their 4-year-old second daughter by ingesting a harmful chemical substance, it is suspected that the husband's sister, who died six years ago, was also killed by ingesting the same substance, an investigation has revealed. I found this out through interviews with people.

The Metropolitan Police Department plans to arrest him again on suspicion of murder on the 6th.


In March last year, company executive Kenichi Hosoya (43) and


his wife Shiho Hosoya (37)

from Taito Ward, Tokyo


, exposed their second daughter, 4-year-old Miki


, to harmful chemicals found in car antifreeze.


He was arrested last month on suspicion of murdering him by ingesting

``ethylene glycol'' and the antipsychotic drug ``olanzapine.''



Regarding the suspects' relatives, suspect Kenichi's older sister Minako Hosoya (41 at the time) died suddenly in her home six years ago in April 2018, and the Metropolitan Police Department is currently investigating the circumstances surrounding her death. I did.



According to investigators,


``ethylene glycol'' metabolites were detected in Minako's organs


, and the suspect couple had a history of purchasing the chemical at the time


. It has been determined that he is suspected of having died from poisoning.



The Metropolitan Police Department plans to re-arrest him on suspicion of murder on the 6th, and will investigate the details of the case as a serial poisoning death case.