Decades-Old Cold Case Cracked: Killer Confesses After Breakthrough Forensic Evidence

A man was handed a prison sentence following his admission of guilt in the decades-old unsolved murder of his girlfriend in Oregon.

Mark Sanfratello, now 73, received a 20-year prison term on Tuesday for the 1983 killing of Teresa Peroni, as confirmed by the Oregon Department of Justice. He admitted to first-degree manslaughter.

“For Teresa Peroni’s family, this has been an agonizing 43-year wait for answers they should never have been denied,” stated Oregon Attorney General Dan Rayfield in an official release.

This case underscores the importance of perseverance. Regardless of how much time has elapsed, we remain committed to seeking justice for those whose lives were taken unjustly,” he added.

“Cases like this remind us of why we don’t give up. It doesn’t matter how many years have passed. If someone took a life, we’re going to keep working until we can hold them accountable.”

Peroni, who was 27 years old, was last seen walking into the woods with Sanfratello, her boyfriend at the time, after the pair attended a house party together in Selma.

Teresa Peroni, 27, was last seen walking into the woods with boyfriend Mark Sanfratello after attending a house party in Selma, Ore., in July 1983. (National Missing and Unidentified Persons System)

She was reported missing shortly after, and authorities concluded her disappearance was suspicious.

However, investigators were unable to secure sufficient evidence to bring charges against anyone at the time. 

Mark Sanfratello was taken into custody in Chico, Calif., in July 2025. (Josephine County Sheriff’s Office)

In 1997, Peroni’s skull was found on a nearby private property, but no additional remains were discovered.

Authorities decided to reopen the case in 2024, and investigators “reinterviewed witnesses, collected new DNA evidence and applied modern forensic techniques to build a case against Sanfratello,” prosecutors said.  

One year later, in July 2025, Sanfratello was taken into custody in Chico, California, and indicted on first-degree manslaughter charges after being extradited to Oregon, later pleading guilty in Josephine County Circuit Court.

Under the terms of his plea agreement with prosecutors, Sanfratello will serve a minimum of 10 years in prison. 

The Oregon Department of Justice and Sanfratello’s attorney did not immediately respond to Fox News Digital’s request for comment.