MAKING A Murderer’s American attorney Kathleen Zellner has thanked Ireland fans for backing their campaign for justice.

A ‘Free Steven Avery’ banner was spotted at the 0-0 draw between the Republic of Ireland and Northern Ireland at the Aviva Stadium on Thursday night.

3 A 'Free Steven Avery' banner was spotted in the Aviva Stadium during Thursday night's game

Zellner — who stars in season two of the smash-hit Netflix docuseries — shared the pic with her 545,000 followers and urged them to follow suit, tweeting: “Aviva banner ‘Free Steven Avery’. You make the banner & we will tweet it.”

Speaking exclusively to the Irish Sun, the wrongful conviction specialist said she was heartened by the showing of support from these shores.

Zellner said: “We know the Irish understand the abuse of power by the powerful so we appreciate the support of our efforts to undo this manifest injustice.”

The hit show, which shocked viewers around the globe on its release back in 2015, returned for its second instalment on October 19.

3 Attorney Kathleen Zellner stars in season two of Making a Murderer

Avery’s new lawyer is working flat out to overturn her client’s controversial conviction over the 2005 killing of photographer Teresa Halbach in Manitwoc, Wisconsin, US.

Zellner claims a new “suspect” called Teresa to the Avery’s yard in Wisconsin, then followed her after she had finished taking pictures of the car she’d called out for.

She says the unknown killer then made her pull over, hit her with an object then put her in the boot of a car before burning her body.

Speaking on the show Zellner said: “I have one goal and that’s to overturn the conviction of Steven Avery.”

3 Avery is currently serving life in prison at Wisconsin’s Waupun Correctional Institution Credit: AP2006

She has also said: “The deeper we dig into the Avery conviction, the more evidence we uncover of his innocence.

“It does not matter how long it takes, what it costs or what obstacles we have to overcome — our efforts to win Mr Avery’s freedom will never stop.”

And earlier this week, she alleged she has key evidence which could see Avery freed as an innocent man.

In 1985 Steven was falsely convicted of sexually assaulting a female jogger.

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It took 18 years for his conviction to be overturned and he took legal action against Manitowoc cops for $36million in compensation.

But days later he was arrested for the murder of Halbach. He is currently serving life in prison at Wisconsin’s Waupun Correctional Institution without the possibility of parole.

Steven’s nephew Brendan Dassey remains behind bars despite initially having his conviction overturned.