how the crooks got the drop on kay mortensen. artin's dad and kay were old friends. kay had known martin as a kid. which is why kay, armed against intruders, welcomed him in and turned his back to his killers. >> he had planned for any worst case scenario to happen. except for the one that happened to him. >> in that there are so many ironies, aren't there? >> there are so many ironies, yeah. >> the biggest perhaps? roger and pam's crazy stories about armed intruders was true all along. though sergeant knutzen still had trouble believing it. >> i can pick up the case and i can read through it and i can read through it and i can see discrepancy after discrepancy. i can see -- >> but can you see where maybe that ain't enough? >> yeah. mm-hmm. >> as for treating his possible evidence, the dream sequence of a girl on meth? >> this is evidence? >> well, it's more circumstantial evidence. it's a lead. >> you'd even call that circumstantial evidence? >> i think it's definitely something we'd follow up with. >> saying she had a dream. >>