A convicted murderer has confessed to the killing at the center of the Netflix true-crime series “Making a Murderer”

The inmate confessed in an interview with filmmakers of the upcoming documentary miniseries “Convicting a Murderer,” directed by Shawn Rech, to murdering photographer Theresa Halbach.

“We haven’t confirmed the legitimacy of the confession, but seeing as it was given by a notable convicted murderer from Wisconsin, we feel responsible to deliver any and all possible evidence to law enforcement and legal teams,” Rech told Newsweek. “Having been in production for 20 months, we’ve uncovered an unfathomable amount of information and evidence that is leading us to the truth. Our investigation does not end here.”

Rech confirmed to Newsweek that the man who confessed is not Steven Avery or his nephew Brendan Dassey, who are both serving time for the murder, as each maintains he is not guilty. The popular Netflix series “Making a Murderer” made a case for Avery and Dassey’s innocence, suggesting that Avery may have been set up by law enforcement agents after he was released from prison on a wrongful rape conviction.It is not clear where or when “Convicting a Murderer” is expected to air. Rech told Newsweek it is intended as a sequel to “Making a Murderer,” and also said he was “misled by the series.”

This is a developing story.