This is a summary in English of approximately 500 words about the "女性連続毒殺魔事件" (Women's Serial Poisoning Murders) based on the provided Japanese Wikipedia excerpts.
The "女性連続毒殺魔事件" (Women's Serial Poisoning Murders) was a series of money-motivated poisonings that occurred in Kumamoto City, Kumamoto Prefecture, Japan, from November to December 1960. In this incident, three women were killed, and one was left in a vegetative state due to poisoning. Both the perpetrator and the victims were all female.
The perpetrator, identified as S, was reportedly facing financial difficulties with debts of around 160,000 yen. Driven by the need to repay these debts, S committed the series of crimes.
The first incident took place on November 6, 1960, when S's mother-in-law visited her home. S poisoned her mother-in-law by mixing pesticide into her favorite lactic acid drink, leading to her death. Although S searched the deceased's belongings for cash, she found none, and the initial attempt to resolve her financial issues failed. The cause of death was initially diagnosed as a stroke, and the crime went undetected.
In December, S planned to kill a neighbor's wife to steal her money. On December 14, S visited the neighbor's house and poisoned her by feeding her horse meat laced with pesticide. Again, the victim had no cash on her person, resulting in another failed attempt to obtain money. Similar to the first victim, the neighbor's death was attributed to a stroke, and the crime remained undiscovered.
On December 17, around noon, S targeted a familiar traveling vendor, giving her miso soup containing pesticide. The vendor did not die, possibly due to a smaller dosage of poison, but was left in a vegetative state. In this instance, S managed to steal 13,500 yen.
On December 28, S murdered another traveling vendor by feeding her natto (fermented soybeans) mixed with pesticide, stealing a meager 15 yen.
The series of crimes came to an end on December 29, when S was apprehended at Kawashiri Station on the Kagoshima Main Line of the Japanese National Railways (now JR Kyushu). A search of S's home by the police revealed high concentrations of pesticide in the natto and miso soup found in her kitchen. Furthermore, a forensic autopsy of the victims detected the presence of organophosphates. Following the investigation, S confessed to her involvement in all four incidents.
S's death sentence was finalized on March 28, 1963, and she was executed on September 19, 1970, at the Fukuoka Detention House. She became the second woman executed in post-war Japan after the "Sugano Village Robbery and Arson Case" convict whose sentence was later commuted to life imprisonment through amnesty. In terms of execution order, she was the second after the convict in the "Hotel Nihonkaku Murder Case" (finalized in 1963).
The Wikipedia page also lists related books, including "毒殺" (Dokusatsu - Poisoning) by Masahiko Ueno. It also includes links to categories related to death row inmates, executioners, capital punishment, criminal procedure, and the history of capital punishment in Japan and other countries. The article indicates a need for specific page or chapter citations for the information provided. The categories associated with the article include post-war Showa era murder incidents, Japanese incidents in 1960, Japanese robbery incidents, female serial killers, Japanese serial murder incidents, cases involving poison, the history of Kumamoto City, incidents in November and December 1960, finalized death penalty cases in Japan, and post-war Kumamoto.
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