Nurse accused of killing 20 elderly patients

Not on my watch’ Nurse confesses to killing at least 20 to avoid ‘nuisance’ of telling next of kin

Not on my watch’ Nurse confesses to killing at least 20 to avoid ‘nuisance’ of telling next of kin

She was arrested Saturday over the alleged murder of the elderly patient in 2016, but she has told police she may have killed up to 20 people, local media said.

Ayumi Kuboki, 31, has been arrested on suspicion of killing Sozo Nishikawa, 88, at Oguchi Hospital, in the city of Yokohama, south-west of Tokyo, in September 2016.

Nurses at Oguchi Hospital are expected to break the news to families if patients die while they are on duty.

Ayumi Kuboki allegedly poisoned the patients by lacing their intravenous drips with toxic antiseptic chemicals at specific times, Japanese newspaper the Asahi Shimbun reported Tuesday.

Police were already investigating the deaths of two patients, including the 88-year-old.

She'd timed it so her victims died when she wasn't at work - because she dreaded having to deal with grieving family members.

Several days after security cameras were installed at the hospital following the deaths of Nishikawa and Yamaki, the cameras caught Kuboki walking in the hospital while carrying a box containing insulin, a drug used to decrease blood glucose levels of patients with diabetes.

A former nurse in Japan may have killed dozens of patients by poisoning their intravenous drips, police have said.


Kuboki initially denied any involvement in the deaths, telling media that she was shocked and felt sorry for the victims and their families.

The chemical, an antibacterial that's readily available within hospitals, was found in Yamaki's body and his IV bag.

Subsequent investigations also found the cleaning agent in the bodies of an 89-year-old man and a woman aged 78 who had died around the same time. Another, who worked alongside Kuboki at a different hospital, said she was "considered competent", although she was "the kind of person who was hard to figure out".

Kuboki was registered as a nurse in 2008 and worked at another hospital before joining Oguchi.

Police began investigating following Nishikawa and Yamaki's deaths and found 10 unused antiseptic-laced IV bags with tiny holes in the rubber seal - indicating they were punctured with a syringe.

Police questioned Kuboki in late June after she quit the hospital.

The Asahi Shimbun also reported she had admitted injecting the drips of around 20 patients with disinfectant. Kuboki reportedly confessed to murdering at least 20 other patients out of the 48 that passed away between July and September 2016.

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