Wisconsin Governor Tony Evers says he will not consider a pardon request from a man convicted of rape and murder, whose story was documented in the 2015 Netflix series Making a Murderer.

The request from Brendan Dassey does not meet the criteria for a pardon consideration because he has not completed his prison sentence and he is required to register as a sex offender, the letter from Governor Evers’ pardons board said.

Advocates have been clamouring for Dassey to be freed but ran out of options in the courts after the US Supreme Court refused to hear his latest appeal.

Dassey, now 30, was 16 years old when he confessed to Wisconsin authorities that he had joined his uncle, Steve Avery, in the 2005 rape and murder of photographer Teresa Halbach, before burning her body in a bonfire.

Avery and Dassey are serving life sentences.

Dassey’s attorneys say he’s intellectually impaired and that he was manipulated by experienced police officers into accepting their story of how Ms Halbach’s murder happened. They wanted his confession thrown out and a new trial.

Authorities had no physical evidence tying Dassey to the crimes, and he testified that his confession was “made up,” but a jury convicted him anyway.

He will be eligible for parole in 2048.

The pardon request argued that Dassey was the victim of a “uniquely and profoundly flawed legal process”.

It says seeking clemency from the governor is “one of the last remaining legal options” available.

-AAP