(CNN) -- The husband of an accomplished Pittsburgh doctor has been arrested in connection with the death of his wife, the Allegheny County, Pennsylvania, district attorney's office, said Thursday. Authorities have ruled that 41-year-old physician Autumn Klein's cause of death was cyanide poisoning. It was not immediately clear whether Klein's husband, Robert Ferrante, had retained representation. Klein was a physician and former head of women's neurology at the University of Pittsburgh Medical Center. She died on April 20. Officials said Ferrante was apprehended by West Virginia State Police after his car was stopped while heading north on Interstate 77 near Beckley, West Virginia.
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Autumn Klein, 41, a physician, died on April 20
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The cause of death was cyanide poisoning
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Her husband is a professor of neurological surgery at the University of Pittsburgh
The complaint, citing witnesses, alleges that @placeholder requested the purchase of cyanide.