Bio

Daisuke Mori was born on April 28, 1971, in Japan. He later became a licensed practical nurse and worked at Hokuryo Clinic in Izumi-ku, Sendai, Miyagi Prefecture. The clinic was a small private medical facility, and Mori worked there during the period when several patients suffered sudden medical emergencies.

Before his arrest, Mori was known as a nurse who handled patient care, including intravenous drips. In 2000, several patients at Hokuryo Clinic suddenly worsened after receiving treatment. These incidents later became part of the criminal investigation against him.

Murder Story

On November 24, 2000, 89-year-old patient Yukiko Shimoyama was being treated at Hokuryo Clinic in Sendai, Japan. Prosecutors later said that Daisuke Mori gave her an overdose of vecuronium bromide through an intravenous drip. Shimoyama died after the drug allegedly caused a fatal medical crisis.

Mori was also accused of trying to kill four other patients in 2000. These alleged attempted murder victims included a 1-year-old girl on February 2, an 11-year-old girl on October 31, a 4-year-old boy on November 13, and a 45-year-old man on November 24. One of the child victims remained unconscious after the incident, according to reports from the time.

Police arrested Mori on January 6, 2001. Early reports said investigators were also looking into other unexplained patient deaths at the clinic. Some media reports at the time claimed he may have been connected to more deaths, but he was ultimately convicted of one murder and four attempted murders, not all of the suspected cases.

Mori denied the charges and pleaded not guilty. His defense argued that the case had major problems, including questions about the medical evidence and the handling of the investigation. Supporters have continued to describe the case as disputed and have claimed he was wrongly convicted.

On March 30, 2004, the Sendai District Court sentenced Mori to life imprisonment. The court ruled that he intended to kill and that he was the only person able to administer the drug at the relevant times. The Sendai High Court upheld the sentence on March 22, 2006, and Japan’s Supreme Court upheld it on February 25, 2008.

As of the latest reviewed status information, Mori remains imprisoned. He was serving his sentence at Chiba Prison.