A US prisoner featured in the Netflix series Making A Murderer was coerced into confessing and should be released from prison, a three-judge federal appeals panel has affirmed.
Brendan Dassey was sentenced to life in prison in 2007 over photographer Teresa Halbach's death two years earlier.
Dassey told detectives he helped his uncle Steven Avery rape and kill Ms Halbach in the Avery family's Manitowoc County salvage yard.
A federal magistrate judge ruled in August that investigators coerced Dassey, who was 16 at the time and suffered from cognitive problems, into confessing.
The state Justice Department appealed the ruling to the 7th US Circuit Court of Appeals.
A three-judge panel from the 7th Circuit affirmed the lower court on Thursday and said Dassey should be freed unless the state chooses to retry him.