A US judge has ordered the immediate release of Brendan Dassey, whose case featured in Netflix's Making a Murderer documentary.
The Wisconsin man's murder conviction was overturned this summer, however, prosecutors are appealing.
The 27-year-old, who has learning difficulties, and his uncle Steven Avery were convicted of murdering a young woman, Teresa Halbach, in 2005.
Avery and Mr Dassey, who was 16 at the time, were sentenced to life in prison.
Judge William Duffin ordered that Mr Dassey be freed from prison under supervision until the next steps in the case become clear, reports the Milwaukee Journal Sentinel.
The same judge quashed Mr Dassey's conviction in August, ruling that investigators had made false promises by assuring him "he had nothing to worry about".