Story highlights Brendan Dassey was set to be released until Wisconsin attorney general fought ruling

Netflix's "Making a Murderer" posits investigators took advantage of Dassey's age, intellect

(CNN) A federal appeals court Thursday blocked the release of Brendan Dassey, the teen whose confession became a subplot in Netflix's "Making a Murderer." The decision from a three-judge panel in the seventh circuit court of appeals in the latest development in a years-long legal battle by Dassey to secure his release and overturn his conviction for the murder 2005 of Teresa Halbach, a local Wisconsin photographer. “Dassey admitted to his crimes in extensive detail, in an entirely voluntary confession, during which investigators used techniques that courts around the country have approved time and again.”

Dassey, 27, has been incarcerated since 2007 over the murder of Halbach. Photographer Halbach went missing on Halloween 2005, with police confirming her charred remains had been discovered in a burn pit on the Avery Salvage Yard in Manitowoc County, Wisconsin ten days later, along with her Toyota RAV4, mobile phone and car keys. Now 27, Dassey was set to be freed under the supervision of the US Probation Office, but Schimel filed a motion Tuesday seeking a stay of US Magistrate Judge William Duffin's decision to release Dassey pending the appeal of his 2007 murder conviction.
The U.S. Court of Appeals for the Seventh Circuit denies the release of Brendan Dassey, subject of the 2015 documentary series Making a Murderer.