MADISON, Wis. -

The Wisconsin attorney general plans to appeal the ruling that overturned Brendan Dassey's conviction in the death of Teresa Halbach.

Attorney General Brad Schimel said Friday he filed a notice of appeal in the United States District Court for the Eastern District of Wisconsin in Dassey v. Dittmann. The appeal was filed on behalf of Warden Michael Dittmann and the state, according to a news release.

Dassey was accused of helping his uncle kill a woman in a case documented in the Netflix series "Making a Murderer."

A federal magistrate judge ruled Aug. 12 that investigators used deceptive tactics to coerce Dassey to confess to helping Steven Avery rape and kill photographer Halbach in 2005. Dassey was 16 at the time.

His office filed notice of appeal with the court but documents outlining the state's arguments will come later.

In a news release, Schimel wrote that the Halbach family has been notified of the appeal and they support the state’s "decision to seek justice on behalf of their daughter.”

The judge ordered that Dassey be released within 90 days, unless prosecutors appealed or retried him.

Dassey and Avery are serving life sentences.