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1952: Australia’s First Thallium Poisoning Murder Conviction: Yvonne Fletcher Sentenced to Death in Sydney

At the Central Criminal Court in Sydney, 30-year-old Yvonne Gladys Fletcher of Newtown was sentenced to death after a seven-day trial for the 1948 murder of her first husband, Desmond George Butler, who died after months of wasting illness caused by thallium poisoning. Asked if she had anything to say before sentence was passed, she replied simply, “No, your Honor,” but moments later a prayer book she had carried through every day of the trial crashed to the floor and she collapsed in the dock, sobbing, as police lifted her out.

Mr Justice Kinsella told the court the crime was “horrible” because the poison had been “secretly administered within the family circle” to an unsuspecting victim, destroying him “mentally and physically while permitting him to linger for months in wretched agony.” Fletcher was the first person in Australian criminal history convicted of murder by thallium poisoning, and the jury recommended that the sale of the poison to the public be banned outright.

What the sentencing did not reveal to onlookers was already known to the court: Fletcher had also been committed for trial over the death of her second husband, who had died from the same poison at Newtown only months earlier. The Crown Prosecutor noted the chilling parallel between the two cases, telling the jury, “There is no question that both Butler and Fletcher died from thallium poisoning… the same matrimonial discord, the same hatred towards each man, the same sudden illness, and the same dreadful symptoms.” The judge himself observed that had this conviction concerned her second husband, evidence of his cruelty toward her might have offered some mitigation, but no such excuse existed for the killing of her first.

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