DNA Names Trucker in Two 1970s Pennsylvania Murders, 50 Years Later

Pennsylvania State Police have identified the man they say raped and strangled two young women in Washington County half a century ago, closing two of the state’s longest-running cold cases with DNA evidence — and with a suspect who died before he could ever be arrested.

At a news conference on 4 November, investigators named James Richard Clark Sr., a long-haul truck driver, as the killer of Susan Rush and Brenda Ritter. Clark died of natural causes in July 2023, aged 66, and was never considered a suspect while he was alive.

“Through advancements in DNA technology and continued investigative efforts, investigators were able to link James Richard Clark to the 1976 homicide of Susan Rush and the 1977 homicide of Brenda Ritter,” the state police said in a statement.

Two women, six months apart

Rush was 21 when she vanished on 25 November 1976, Thanksgiving Eve, on her way to a church service. She was raped and strangled, and her body was concealed in the boot of her car.

About six months later, Ritter, 18, was found dead in a field roughly two miles away. She, too, had been raped and strangled.

For decades the two cases sat unsolved, with no suspect and no established connection between them. It was not until 2025 that DNA testing confirmed what investigators had long suspected: a single offender had killed both women.

“This testing confirmed there was a serial killer in Washington County during this timeframe,” Cpl. James Petrosky of the Pennsylvania State Police Criminal Investigation Assessment Unit said at the news conference.

How the DNA breakthrough happened

The breakthrough came in stages. DNA from Ritter’s case was submitted to the national Combined DNA Index System, known as CODIS, as early as 2008, but the technology of the time could not produce a match.

Fresh funding from the Washington County District Attorney’s Office and the federal Bureau of Justice Assistance’s Prosecuting Cold Cases Using DNA programme, granted in 2021 and 2022, paid for updated testing. By May 2025, investigators had confirmed that the DNA profiles from both crime scenes came from the same man.

Pittsburgh-based Cybergenetics then used its TrueAllele software to compare the evidence genotypes from the two cases, producing a match strength of about one million — strong support that both profiles came from a single unknown man. Further laboratory work and investigation then identified that man as Clark, whose DNA had been left at both crime scenes, according to the Observer-Reporter.

A second round of DNA testing confirmed the match.

No arrest, no answers

Because Clark died in July 2023, there will be no prosecution, no trial and no chance for investigators to question him. Police say they do not know whether he knew either woman, followed them beforehand, or came across them by chance.

“We don’t know at this point, and unfortunately he died, so we don’t have the opportunity to arrest him and interview him,” Petrosky said.

Investigators have not identified any additional victims, but they say they will keep examining the evidence. Petrosky warned that the two murders may not have been Clark’s only crimes. “Once a serial killer, always a serial killer. I believe there could potentially be more victims out there,” he said.

What the cases say about cold-case science

The Washington County cases are the latest example of how modern DNA analysis is rewriting cold cases that once seemed permanently unsolved. Evidence that sat in storage for decades can now be re-examined with tools that did not exist when the crimes were committed — and, increasingly, with funding set aside specifically for that purpose.

For the families of Rush and Ritter, the announcement brings an answer, if not justice in a courtroom. After nearly 50 years, police can finally say who killed them. What they cannot say is why — or whether anyone else was ever in danger from the same man.

The identification comes weeks after another long-running fugitive case ended when an escaped Tennessee prisoner was captured after a nine-day manhunt. While violent crime fell sharply in the United States in 2025, according to a Justice Department survey, cases like those in Washington County are a reminder that the crimes of one generation can take another to solve.