PITTSBURGH (AP) – A former University of Pittsburgh researcher awaiting sentencing in the poisoning death of his neurologist wife is asking a judge to lift an order barring his adult children from a previous marriage from having contact with his young daughter.

Sixty-six-year-old Robert Ferrante was convicted of first-degree murder in Allegheny County last fall in the April 2013 death of 41-year-old Dr. Autumn Klein.

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Prosecutors said he laced her energy drink with cyanide.

The court ordered no contact between his daughter and her adult half-siblings after prosecutors said the 8-year-old girl could be a witness in the case.

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Ferrante’s attorneys called the order “disingenuous and made without any basis of fact,” and they say it’s moot since the trial is over.

Ferrante is scheduled to receive a mandatory life sentence Wednesday.

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