and robert ferrante and his wife, dr. autumn klein, relocated from boston, were just the kind of renaissance minds the city was hoping to attract. autumn's colleague dr. karen roos. >> she said that she loved pittsburgh. she loved her patients. that the people of pittsburgh were wonderful, and she was so happy to be there. >> reporter: autumn had always intended to be a care-giver. her cousin, close as sisters, sharon king remembers that even as a little girl she administered playtime tlc. >> we had a doctor's office. and our patients were our stuffed animals. >> reporter: and dr. autumn klein was holding clinic hours, huh? >> she was the doctor. >> reporter: it was an interest that took root early for autumn and never left. always a top of her class student in the baltimore area, she later got her undergraduate degree in neuroscience from amherst. >> helping people was the main thing. she was just so smart, so intelligent, so thoughtful and so caring. >> reporter: you and your husband must have been very, very proud of h

dr. ferrante was googling searches concerning cyanide, where to purchase it, how to purchase it, the effectster: and he didn't stop there. the prosecutor said bob ferrante then made an interesting request to his lab associates, something later relayed to detectives. >> he goes to the purchasing person in the laboratory and he tells this person that he wants to order a bottle of cyanide. >> reporter: has he ever done that before, detective? >> never. >> reporter: better yet, the detectives explained, the doctor asked for the cyanide to be delivered overnight. and when is all this in relation to-- autumn's-- slumping to the floor in her home? >> two days prior. >> reporter: two days prior? >> yes. >> reporter: ferrante, he said, had even left his fingerprint on the container which, interestingly to them, had 8.3 grams of cyanide missing. what, like a heaping teaspoon full, maybe, of cyanide? >> i think about a teaspoon full would be about eight grams. >> reporter: is that a lethal amount of cyanide? >> yes. >> reporter: prosecutor lisa pellegrini said the defendant thought he was so smart, foo