anything like that to do something in the car? yeah. what did he do under the hood if that s what he did? i don t know what he did, but i know he went under. and dassey s attorney say in that same interview the investigators used another crucial detail they learned about the case from the forensics. they had received a report from the wisconsin crime lab indicating for the first time how teresa halbach had died. she had been shot in the head. they worked extremely hard to get brendan to say that. we have the evidence, brendan. we just need you to be honest with us. they cut off her hair. what else was done to her head? that he punched her. what else? it s okay. cut her. what else happened to her, in
ha halbach. they became fast friends in college. both were photographers working at the same studio in green bay. she would get this smile. that was one thing i think she really loved to do is just make other people smile. the two stayed in touch after graduation as they launched their careers, but that would all change suddenly on october 31st, 2005. kim caught a story on the local news. teresa was messing. investigators say the 25-year-old photographer was on assignment for auto trader magazine when she disappeared. and i just kind of dropped knowing it was somebody i knew. and what do you do in that moment? i felt helpless because you want to just deny it, you want to get in touch with her. didiotry to call her? i did try to text her but no response? no response. wisconsin police quickly launched a massive search.
wrongful conviction cases and says she has freed many defendants, including ryan ferguson. sandy contacted her, and she joined the case not long after making a murderer came out. we caught up with her at the correctional institution when she paid a visit to avery in $2016. million question. do you think you have new evidence that could free steven avery? we do, yeah. reporter: zellner invited dateline into this war room she created outside of chicago, all dedicated to the avery case. do we know if that was tested? reporter: and she even showed us this rav4 she bought to get a better understanding of teresa s vehicle. then in august of 2016, to much media fanfare, she filed a motion in manitowoc county court, featuring new testing of the evidence. we re going find out one way or the other was the evidence planted. reporter: kathleen zellner is known as an aggressive prosecutor. ari melber is a chief legal
after teresa s disappearance he and his partner brought avery in for an interview. date hine filed a freedom of information request to obtain the video. you know the key is there because you put the key there. that s the only way the key gets there. no. avery was defiant and even claimed cops were framing him, planting evidence. they weren t buying it and placed steven avery under arrest. i didn t do it. somebody s doing a good job on me. investigators were convinced they had their man. still, they didn t know how or why teresa had been killed. coming up, shackles, handcuffs, strange behavior. teresa s creeped out. could something in his past have led him to murder? why would steven avery do this? we know that he s a psychopath. we know that he has do we know that?
handcuffs. he answers the door that day wearing a small white towel and teresa we know is creeped out by that behavior. she tells friends and coworkers about that. krats believes avery s behavior shows a sexual obsession with teresa that led to murder. why would steven avery do this when he was on the verge of getting this big wind fall, potentially millions of dollars? that s a great question. we know that he s a psychopath. do we know that? let s say i allege that, okay. i believe that deep down. he discovered more on avery s past. 18 years before teresa s murder avery wrote this letter to his estranged wife from prison saying i will kill you. and a former fiancee told police he had physically abused her. i krats said he learned something even more disturbing. this 2006 police report says a