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Steven Avery of "Making a Murderer" appeals conviction

MILWAUKEE -- A convicted Wisconsin killer who is the subject of the Netflix series "Making a Murderer" has filed a new appeal seeking his release.

Steven Avery says authorities used an improper search warrant and that any evidence found as a result "is clearly 'FRUIT OF THE POISONIOUS (sic) TREE.'"

He also alleges that a particular juror repeatedly told others jurors that Avery was "(expletive) guilty." Avery says the alleged statements are evidence of "preconceived guilt."

Avery was convicted of first-degree intentional homicide in the death of photographer Teresa Halbach a decade ago. Avery had been wrongfully convicted years earlier in a rape case and served 18 years in prison.

He had sued Manitowoc County for tens of millions when he and his nephew were arrested in Halbach's death.

Manitowoc County Sheriff Robert Hermann says he hasn't seen Avery's appeal, which was filed Tuesday. Hermann previously has said that the investigation was proper.

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