chief rizzo is on the case and learns regan has been sleeping with a married woman named kelly cochranestions kelly and husband jason and sees red flags right away. what's your initial reaction when you meet them? >> watching and listening to the interviews, you know, at that point i knew that there was -- something wasn't right, there was most definitely a possibility of their involvement. >> hi, i'm chief rizzo with iron county police, nice to meet you -- >> reporter: chief rizzo wonders if jealousy over the affair may have something to do with the missing man. she eventually gets a search warrant to enter the cochran house. police gather evidence. but make no arrests. then, under the cloak of darkness, the cochrans flee to indiana. >> normal people pack their things and take them, they don't just leave everything behind. which is what they did. >> reporter: the neighbors they left behind in michigan tell chief rizzo the cochrans began behaving strangely around the time chris regan went missing. using power tools in the middle of the night. then came an invitation for dinner. >> kell