MILWAUKEE (SPECTRUM NEWS) – Steven Avery's murder trial in Manitowoc County gained national attention from the Netflix series “Making a Murder” and now the story is taking another turn.

Avery and his nephew Brendan Dassey are serving life sentences for the 2005 murder of photographer Theresa Halbach.

Barely a week after Avery's lawyer announced a $100,000 reward to find Theresa Halbach's 'real killer,' an inmate in a Wisconsin prison comes forward.

Joseph Evans, Jr., an inmate at the prison in Boscobel serving a life sentence for killing his wife, is taking responsibility for what he calls a cover-up.

The name may sound familiar because a few years ago Evans claimed his then cellmate Steven Avery confessed to murdering Theresa Halbach when the two became friendly.

That first letter was published on the Rockford Advocate website.

Now, in a new seven-page letter to Avery's attorney Kathleen Zellner, Evans is changing his story confessing to the murder himself and admitting to framing Steven Avery for the crime.

In the letter, Evans says he went to Avery's salvage yard on October 31, 2005, to find a part for his vehicle.

He claims he saw a vehicle parked next to a trailer house when a lady stepped in front of his vehicle.

Evans says he hit that woman with his car.

He claims she was unconscious from hitting her head on a rock.

Evans said he loaded the woman into her Toyota Rav 4 to take her to the hospital but she died from her injury.

Panicked and scared, Evans says he went inside Steven Avery's trailer, which was unlocked and nobody was home, where he found a gun and the DNA evidence he says he planted inside the Rav 4.

Evans claims he shot the woman multiple times, covered the body in debris, and lit the pile on fire.

Evans is asking for the $100,000 reward plus another $250,000.

He wants $2,000 deposited into his prison account by the end of the month to move forward and set up a meeting.

In a Tweet, Steven Avery's lawyer says the handwritten confession is worthless unless it is corroborated.

The Wisconsin Department of Justice issued a statement Tuesday afternoon to USA Today Network-Wisconsin: 

"The Wisconsin Department of Justice has received the new information related to the case. DOJ takes all credible reports seriously, but it's important to note that this new information directly contradicts information previously provided by the same individual."