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PITTSBURGH (AP) — The Pennsylvania Supreme Court has declined to hear the appeal of a former University of Pittsburgh medical researcher convicted in what prosecutors say was the cyanide poisoning death of his wife.

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Sixty-nine-year-old Robert Ferrante was convicted of murder and was sentenced to life without parole in the April 2013 death of 41-year-old Dr. Autumn Klein.

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Allegheny County prosecutors say he put cyanide in her energy drink, which text messages show he urged her to drink to enhance her fertility.

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An appeals court rejected defense arguments that cited a successful transplant of Klein’s liver as evidence that cyanide couldn’t have killed her.

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Defense attorney Chris Eyster told the Tribune-Review on Wednesday he will seek further review of the conviction. He says they’re confident they’re “going to get this reversed.”

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