. >> reporter: sarasota county lead homicide prosecutor, karen fraivillig, believed danielle manipulated>> she's a very manipulative person, and she was able to manipulate michael minor, and there's a dead man because of that. >> reporter: the question now before the prosecutor, could she prove it in court? >> coming up -- will one lover betray another? >> we were hoping that he would contact us and said, hey, i want to tell you the truth. >> and the lover left behind ponders what might have been. >> was he the one? >> he was the one without a doubt. he still is the one. >> when "dateline" continues. n . so why am i still thinking about this? i'll take aleve. aleve. proven better on pain. in how they craft tatheir orange juice? the corporate executives of coke and pepsi, or the farmers of florida's natural? only florida's natural is always made in florida by florida farmers. great taste. naturally. show your gut some love. only activia has billions of our live and active probiotics. a delicious way to enjoy probiotics every day. with 20 years of devotion to gut health. activia. like no o