police got multiple tips urging them to look at maurny. >> marnie was a single mother very devoted toer children. >> my mom had three jobs at one time. >> she was a real estate agent, an aspiring fitness model. >> my mother has always tried her best for us. >> maurny says she met shaun at a bears convention. she was working security. >> i remember him mentioning that he was looking for some investment property, because it had come out that i was a real estate broker. >> the two started doing real estate deals and their relationship turned sexual. two months after the murder, police brought marnie in for questioning. >> did you know the extent of his relationship with the victim? >> i didn't. know the extent of the relationship. i know he had told me he had gotten somebody pregnant. >> she seemed relaxed and comfortable.t want to help. >> you don't mind coming back in to talk to us? >> no, that's fine. >> okay. >> the night before the murder, what we found out is that maurny was at shaun gayle's house. >> police execute a search warrant and discover marnie had been accessing his e-mail