avery's trial began in february, 2007. >> all of the evidence points to one person. >> reporter: d.a. kratzn't call brendan dassey to the stand, but relied on the physical evidence to say what he believed happened -- steven avery lured teresa out to his property, disguising his calls to her. kratz said that when she got there, avery shot her in his garage. he then shoved her into the back of her car and later burned her body. >> the physical evidence, the dna evidence, the eyewitness testimony, the scientific evidence, common sense all point to one person. >> reporter: but avery's defense attorneys said that evidence pointed in a completely different direction. >> what would a case look like if somebody was being framed?. it would look a lot like this case. >>> coming up, the key. >> your theory is that the key was planted? >> yes. >> the bones. >> there was clear evidence that the bones had been moved. >> the blood. >> was any of this evidence what it seemed? everytime she sniffs... this happens. still there. still, still there. now thats how you rock a long travel day. new scent duets fro