A man who pleaded guilty to brutally raping and murdering a woman in San Luis Obispo County is set to walk free after Gov. Gavin Newsom refused to block his parole — despite a prosecutor’s repeated pleas to keep him behind bars.

Alberto Tamez Jr., 75, who was convicted of viciously raping and strangling Genevieve Adaline Moreno in 1974, was granted parole by the state board late last year despite San Luis Obispo County District Attorney Dan Dow fighting his release at every step.

Alberto Tamez Jr. will walk free after Gov. Gavin Newsom decided not to intervene on a parole decision.…