gilberto nunez was his full name.s originally from the dominican republic. >> how long have you known him? >> i've known him for like four years he. we start our friendship around three years ago. >> gill seemed to know a lot about tom's life, his work hours, his marriage, even his medical history. >> at any medical conditions that you know? >> yes. but i know, he had sleep at the. >> investigators also fished for information about tom's wife. >> how is linda doing? >> i've been -- there you, know i go to the house. >> how is she doing? >> she is not too good. you? now she's very, really, really, really bad. >> you know. bad shape. >> that wasn't all gill had to say about linda. he had saying far more interesting to share with the detectives. >> how long have you guys known. me and linda, we've had a relationship. >> okay. >> sexual relationship, i'm assuming? >> well, yeah. >> what is that moment like when he reveals he is having an affair with linda coleman? >> i think it caught us off-guard because that was the fir