. >> co-workers, including her friend, melissa madge, had gone to her house to check on her and foundresa's dog, cell phone, purse, and car. and that frightening spot of blood on the bumper of theresa's car. >> you've known her all your life, and you show up at her house and she's gone, but all her stuff is still there. >> i think at that point i was in complete shock. you know, where was she? >> las vegas metro police responded and patrol quickly made a call that reached vegas homicide. a squad that included detective marty wildman and sergeant mike mcgrath was soon on the scene. >> we looked at the blood smear on the rear bumper of the car, then we said everybody out, we're taking this, started going through the house method cli. >> processing it as a homicide scene basically. >> it looked to detectives as if theresa had been attacked, and clues found throughout the house supported that. on the stairs, a footprint too large to be theresa's, and this. >> we saw a small little brass or metal ring. >> steps away in a half bath, detectives found a towel rack missing from a wall. and two