A Wisconsin prisoner featured in the Netflix series Making A Murderer made a voluntary confession and was properly convicted, a court has heard.

Dean Strang rose to fame off the back of the hugely popular crime docuseries - Making a Murderer - released in late December 2015, detailing the recent life of Steven Avery.

Steven Avery, the convicted killer who is the subject of the Netflix series, Making a Murderer, has filed a wide-ranging appeal claiming that authorities used an improper warrant and that a juror was out to get him.

Wisconsin governor, Scott Walker, will not pardon a man convicted with his nephew of murder, in a case dramatised in the television documentary, Making a Murderer, despite online petitions seeking their release, his office said.