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> reporter: might have tossed and turned all night thinking about that. but something inside him said, "" property="og:description">
> reporter: might have tossed and turned all night thinking about that. but something inside him said, "">
case and i'm thinking, "where do i go from here?" >> reporter: might have tossed and turned all night thinking about that. but something inside him said, "nope." >> i'm not gonna be able to get any sleep. i might as well go back out there and see what i can find. >> reporter: wouldn't be his first wild goose chase. he had carter's address. so, wee hours of saturday morning, he drove over there and what do you know? >> i saw a black infiniti backed in, right in front of their apartment. >> reporter: but he didn't knock on her door. >> i was going to go ahead and basically sit here and watch the vehicle to see if it moved. >> reporter: for more than four hours, he sat in his car, cold but patient. then about 8:00 a.m. saturday morning, he saw the lights of the infiniti flash as if someone was unlocking it remotely. >> i see the male enter the driver's seat of the vehicle. i then see a female enter the passenger side of the black infiniti. >> reporter: they drove off. the detective followed. and after a few minutes the infiniti pulled into, of all places, the hulen mall.