Mrs. Negishi, from Japan, is married to the Nobel Chemistry laureate Ei-ichi Negishi.
The wife of Eiichi Negishi, a victor of the 2010 Nobel Prize in chemistry, has been found dead in Rockford, Illinois, with no foul play suspected, local police said Wednesday.
It was then police learned the man and his wife were reported missing Monday out of West Lafayette, Ind.
Deputies later found the couple's vehicle and the body of his wife, Sumire Negishi, at the nearby Ochard Hills Landfill, the sheriff's department said.
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Indiana State Police Sergeant Kim Riley says the family had no indication the Negishis were in the Rockford area.
"We are devastated by the loss of our beloved wife and mother, Sumire Negishi, who was near the end of her battle with Parkinson's", the family said in its statement.
The sheriff's department says foul play is not suspected, but wouldn't discuss autopsy results. He was taken to a Rockford hospital for treatment. 13 News has confirmed that Mr. Negishi is a chemistry research at Purdue University. The Japanese scientist won a Nobel Prize in chemistry in 2010 for a palladium-catalyzed cross coupling technique to link carbon atoms.
More details about the death investigation were not immediately available.