it's easy to see why. at just 41, she was one of the top experts in her field. chief of the division of women's 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.