you know derrick dorsey?ur customers. he's like, when was the last time you were at the house? and i told him, you know, ways there friday or whatever it was. >> reporter: they also asked if he knew anything about kim. even then, he said he had no idea why police were so interested in the dorseys. >> she was very sweet, very nice. you know, she'd always, you know -- and i've only saw her a couple times. >> reporter: one of them was that friday. he had been called to the dorsey home to fine tune the entertainment system. while he was there, he noticed a chill between the husband and wife. >> i remember just she walked -- she would walk by and say, hey, guys, i'm headed to the gym. and i said, okay. we'll see you. and derrick didn't say anything to her. i thought that was weird. you know, i was like, you don't say bye to your wife? but i guess he was more interested in getting his electronics fixed, i guess. >> reporter: yeah, because something must have jumped out at you. first of all, you don't even know this