She was the first person to be found guilty under the Federal Anti-Tampering Act, which was enacted after the 1982 Chicago Tylenol murders.
On May 9, 1988 she received a 90-year prison sentence for the murders of her husband and a bank manager. She got the dubious honor of being the first person to be convicted of murder by product tampering (she added cyanide to Excedrin tablets).
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