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  1. ITV Report

Making A Murderer's Steven Avery files for appeal

Steven Avery Credit: Netflix

A convicted murderer whose case was featured in the documentary series Making a Murderer has filed a new appeal seeking his release.

Steven Avery, 53, claims US authorities used an improper search warrant and said that any evidence found as a result "is clearly fruit of the poisonous tree."

Avery was convicted of first-degree intentional homicide in the death of photographer Teresa Halbach in Wisconsin ten years ago.

Steven Avery pictured during his first time in prison, when he spent 18 years in jail on a wrongful conviction Credit: Making of a Murderer/Netflix

Avery had been wrongfully convicted years earlier in a rape case and served 18 years in prison before he was cleared by DNA evidence.

He was suing Manitowoc County for tens of millions of dollars when he was arrested over Ms Halbach's death.

Manitowoc County Sheriff Robert Hermann said he has not yet seen Avery's appeal. He previously said that the investigation into Avery's case was proper.