painkillers laced with the deadly poison, cyanide, killed two Americans in 1986. police were closing in on their number one suspect, Stella nickell, but needed more evidence. from her public library records, they discover she had taken out books on poisoning human poisoning and Deadly Harvest. the FBI discover 84 of her fingerprints mainly on pages about cyanide poisoning. in 1988, she was found guilty and sentenced to 90 years in prison.
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