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Last month, a judge denied Avery's request for a new trial; his attorney argued investigators mishandled bone evidence.

The reward money \"has nothing to do with the merits of Avery's appeal which will be filed on 10/10,\" Zellner tweeted Monday.

Avery's case was made famous in the series \"Making a Murderer\" released on Netflix in 2015.

Avery's nephew, Brendan Dassey, was also convicted in Halbach's killing.

The Associated Press contributed to this report.

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