For 35 years she was a question on a Washington State Patrol case file: an unknown woman who died in a burning tractor-trailer on Interstate 5 near Kalama on May 14, 1991, known to investigators only as “Helen Doe.” This week, the State Patrol said the question has an answer. Forensic DNA profiling and genetic genealogy have identified her as Mary Ellen “Mollie” McCullough, a 34-year-old Ohio native, FOX 13 Seattle and Seattle-area reporting said on November 12, 2026. A detective sergeant has told her brother the news, confirmatory DNA testing has established the family link, and her family plans to bring her remains home to Cambridge, Ohio, where she was born.

The crash happened on Interstate 5 near Kalama, in Cowlitz County in southwest Washington. McCullough was a passenger in a tractor-trailer that crashed and caught fire; the fire was severe, and both she and the truck's driver died, according to the State Patrol's case history. In 1991, investigators could recover DNA, dental records and X-rays, but no name. The unidentified passenger became “Helen Doe,” and her file joined the hardest category in missing-persons work: a person whose family, somewhere, did not know where she was — or that she had died on a highway in Washington.

What investigators did have, they kept. The autopsy recorded that she had severe scoliosis, with a convexity to the right, and she was about 5 feet 1 inch tall. Over the decades, detectives released sketches of what she may have looked like and appealed for anyone who recognised her. In January 2022, the State Patrol issued a renewed appeal with an updated forensic sketch created with the group Lost and Missing in Indian Country and forensic artist Natalie Murry, asking the public to contact Detective Stacy Moate with any information. The appeals brought no name — but the preserved DNA waited for the science to catch up.

The breakthrough: DNA and family trees

The case was reopened in 2014, and investigators spent years pursuing leads, according to the reporting. The breakthrough came through advanced DNA profiling combined with forensic genetic genealogy — the technique that builds a family tree outward from an unknown person's DNA until living relatives come into focus. On August 6, Detective Sergeant Stacy Moate contacted McCullough's brother, Michael, and further DNA testing confirmed their family connection, the reporting said. With that confirmation, “Helen Doe” was formally identified as Mary Ellen “Mollie” McCullough.

For her family, the identification closes a silence that began in 1991: relatives had not heard from McCullough since she left Florida that year, the reporting said. She was born in Cambridge, Ohio, and the family plans to bring her remains back to Cambridge — a journey home 35 years after she died, unnamed, on the far side of the country.

The identification is not connected to any criminal investigation in the reporting: this was an identification case, not a homicide inquiry, and authorities have announced no charges connected to it. Its significance is quieter and, for one family, larger. Genetic genealogy is steadily resolving Doe cases across the United States that fingerprint and dental-record searches could not, and each resolution returns a person — with a name, a hometown and a family — to the record.

There is a particular poignancy in where she died. Interstate 5 is the West Coast's great trucking corridor, and McCullough was riding in a working truck when she was killed. For 35 years, drivers passed the stretch near Kalama without knowing that the woman who died there in 1991 had a brother still waiting to learn what had become of his sister. That wait is over. Anyone with information about McCullough's final months can still contact Washington State Patrol detectives, who worked the case for more than three decades to give her back her name.