the lab where klein s husband works. a source close to the investigation confirms cyanide was found in his lab. but neighbors say there was no indication of trouble in the home. she was very happy. she was very relaxed. reporter: dr. ferante s attorney says authorities are looking at his client. i m sure what do they call it, person of interest or suspect. i don t think there s any doubt about that. reporter: pittsburgh authorities would not comment about whether he is the primary focus of suspicion, saying the investigation s being handled by homicide detectives, but no suspect has been named. lieutenant kevin krause, commander in charge of the major crimes unit for the pittsburgh police, tells us dr. klein s death is being treated as a suspicious death investigation. renowned forensic pathologist dr. cyril wecht says in his long career, he can count the number of cyanide murders he s seen on one hand. 70% or more are suicides. and the vast majority of the
neurology at the prestigious university of pittsburgh medical center. she was married to another successful neurologist and together, they had a 6-year-old daughter. by most measures, dr. klein had it all. but on a recent friday night, there were investigators searching her beautiful home, carrying out items like computers and vacuum cleaners, even taking the family cars, all in an effort to solve a tragic mystery. this doesn t happen. this is like somebody said it s like a movie. reporter: it all began on the night of april 17th on this street at the home of dr. klein. when according to authorities, her husband, 64-year-old dr. robert ferante, called 911 to say that he thought his wife was having a stroke. dr. klein was rushed to her own hospital, where she died three days later. early test results suggest it was no stroke or heart attack or aneurysm. it was poison. the preliminary autopsy revealed she died of cyanide poisoning.
i d say extremely rare. reporter: cyanide is so deadly, bloom says, an amount the size of a baby aspirin can kill. but it s not supposed to be easy to get. the most likely place that you would find cyanide would be in medical laboratories and university laboratories. reporter: that could explain why authorities used search warrants and subpoenas to search the lab where klein s husband works. a source close to the investigation confirms cyanide was found in his lab. but neighbors say there was no indication of trouble in the home. she was very happy. she was very relaxed. reporter: dr. ferante s attorney says authorities are looking at his client. i m sure what do they call it, person of interest or suspect. i don t think there s any doubt about that. reporter: pittsburgh authorities would not comment about whether he is the primary focus of suspicion, saying the investigation s being handled by homicide detectives, but no
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