she comes back so she can go back to her family. >> when fassbender arrived on site, it learned teresa halbachntment at the salvage yard on october 31st to take photos of this avery's sister was selling. teresa left a message that morning. >> hello, this is to reason with auto trader magazine. i'm with the photographer and i'm giving a call to let you know that i can come out there today. in the afternoon, and it would probably be around 2:00. >> steven avery confirmed to investigators that teresa had been on the property that they, and left around 2:30 pm. avery didn't tell them much more, but for investigators, a dark tail started emerging from the physical evidence, especially when they made a gruesome discovery in the back up to reassess suv. >> we find teresa's blood in the vehicle primarily in the cargo area of the rav4. >> and in the front, more blood. >> there was blood on some of the upholstery and very telling swipe of blood near the ignition switch on the vehicle. >> tests showed that blood was steven avery's, taking him from person of interest to prime suspect. >> you believe you c