The lawyer for Steven Avery - the convicted man at the centre of Netflix series Making a Murderer - has spoken out to explain why he didn't represent him on appeal.

The 10-part documentary followed legal team Dean Strang and Jerry Buting as they worked to acquit Avery of the murder of photographer Teresa Halbach in Wisconsin in 2005.

Now working with prominent Chicago attorney Kathleen Zellner, Avery is asking a Wisconsin court to re-consider his conviction in a formal appeal.

Speaking to host Adam Carolla and criminal defence lawyer Mark Geragos on PodCastOne's Reasonable Doubt, Strang insisted it would have been "irresponsible" to represent Avery on appeal.

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"Jerry and I didn't represent Avery on appeal," he said. "Just because, in Wisconsin, you normally have to look at whether there was ineffected assistance of trial council immediately on appeals. 

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"So we got off and weren't on the habeas either for the same reason."

Strang also spoke on the podcast about their denied request for third-party liability in the current justice system and why he "doesn't think much" about the prisoners claiming Avery had a sex chamber. 

In an interview last week, Strang and Buting had no time for complaints that Making a Murderer was biased in Avery's favour.