CHICAGO - A federal appeals court has affirmed a judge's ruling that overturned the murder conviction of Brendan Dassey.

In a 2-1 ruling issued Thursday afternoon, the U.S. Court of Appeals for the Seventh Circuit upheld the August 2016 decision by Federal Magistrate William Duffin of Milwaukee.

Duffin found that Dassey’s constitutional rights were violated because investigators for the prosecution made false promises during multiple interrogations. Dassey was convicted in the 2005 murder of photographer Teresa Halbach. His uncle, Steven Avery, also is serving a life term in connection with the killing.

The state appealed Duffin's ruling, putting the case before the federal appeals panel.

The Wisconsin Department of Justice had no immediate comment on Thursday's ruling.

"We are still reviewing at this time," said Johnny Koremenos, director of communications and public affairs for the DOJ.

This story will be updated.