. >> reporter: laura nirider, one of dassey's lead attorneys and fiercest defenders. >> come on, buddylet's get this out. okay? >> what you have here are police officers who are using psychological interrogation tactics that were designed for seasoned adult criminals on a 16-year-old with intellectual limitations. >> reporter: the interrogators aren't banging the table. they're not threatening him. does it fit into the sort of classic model of coercive interrogations? >> absolutely it does. >> reporter: at the time of his arrest brendan dassey was a high school sophomore in manitowoc county, wisconsin. he had a low i.q. and was enrolled in several special ed classes. he lived on the family's salvage yard right next to his uncle steven. >> i'm free. >> reporter: who'd been released from prison after serving 18 years for a rape he didn't commit. >> i'm just glad you're home, honey. >> reporter: but then avery was arrested and charged with the murder of teresa halbach. >> dwroent you have have a seat, brend snn. >> reporter: several months later brendan was brought in for questioning. >>

. >> reporter: if she can get her client a new trial, laura nirider hopes to demonstrate how she says the interrogators railroaded dassey. >> we just need to see the w wle story from you. >> they reduce him over time to a place where heoesn't think that he can convince these officers of his innocence. d when he's at that position of hopelessness, then the officers offer him a way out. >> your mom said you'd be honest with us. >> she's behind you 100% no matter what happens here. >> that's what she said. because she thinks you know more too. >> we're in your corner. >> and what you see is brendan beben to believe the officers and think, okay, i have to say these things that they want me to say. breaks down and confesses any nirider says by her analysis he offers no information that was not already widely reported in theemedia. >> the 25-year-old photographer disappeared last halloween. >> was last seen takinin pictures at the avery salvage yard. >> reporter: or directly fed to him by investigators. >> all right. i'm just going to come out and k you. who shot her in the head? >> he did.