theresa's body had been found just two miles from jeff fenton's apartment. ce soon learned he had an air tight alibi. that evening jeff and his new girlfriend were buying a car, and police believe they were at the car dealership during the exact hour when theresa was murdered. >> this whole process, it just seems so unreal to me. >> still, detectives thought jeff fenton, the man who had panic attacks and was described as highly stressed didn't seamstressed at all by the murder of his former fiance. >> it's just really upsetting. >> well, here's the thing that i don't understand. i mean, i get upset, i'm upset, okay? you, right now to me, don't appear upset. you're like this, flat line. okay? and you're saying, watch me. i'm really upset. you know. why is that that i'm get that long from you as just nothing is bothering you? >> i just don't think i've been able to process everything that's happened. >> one possible reason for jeff fenton's flat affect? he was taking anxiety medication. another? he had just lost his former fiancee', and was confused by all of t