He is currently serving a life sentence for the murder of photographer Teresa Halbach

A judge has ordered that evidence in the case of Making A Murderer subject Steven Avery be retested.

Avery’s lawyer, Kathleen Zellner, said an agreement to start independent scientific testing on critical pieces of evidence has been signed by Wisconsin judge Angela Sutkiewicz .

Among the evidence set to be tested, includes Avery’s blood sample in the documentary.

Zellner said she feels encouraged that the attorney general’s office was “helpful in expediting these tests,” reports CBS News.

The agreement comes nearly three months after Zellner pledged she had a plan to overturn his 2007 conviction.

Avery was sentenced to life in prison after being convicted of first-degree intentional homicide in the 2005 death of photographer Teresa Halbach in Manitowoc County, Wisconsin.

“There is evidence that already exists in the case that points to a different location and a different suspect,” Zellner said earlier this year.

“We’ve got a combination of forensic evidence and a tip from somebody that we’ve interviewed multiple times that we think is credible.”

She continued: “It may not all be successful. But I believe if even one bit of evidence is planted, the conviction is going to be vacated. I’ve never seen a more graphic, compelling illustration of a crime scene that was fabricated.”

Zellner has previously won 17 appeals with previous clients in terms of getting wrongful convictions overturned. Avery previously said he was confident that she will do the same for him.

“I’m going to be free,” he said. “I thought sooner or later [this day] would [come], The truth is coming out.”

Meanwhile, Brendan Dassey’s release from prison was recently blocked by a federal appeals court, despite a judge calling for his immediate release. Dassey is Avery’s nephew, who was convicted in 2007 of helping his uncle allegedly rape, kill and mutilate Halbach.

His murder conviction was overturned in the summer. In September, it was reported that Making A Murderer creators Moira Demos and Laura Ricciardi are planning to recreate the moment Dassey’s conviction was overturned. Neither the directors, Netflix nor his family were given advance notice of the decision to overturn the conviction.