A woman who remained unidentified for 35 years after dying in a truck collision in Washington State has finally been identified through forensic DNA analysis and investigative genetic genealogy.
The Washington State Patrol announced on November 12, 2026, that the woman, previously known as Helen Doe, was Mary Ellen “Mollie” McCullough, who was 34 years old when she died.
On May 14, 1991, a semitrailer was involved in a serious collision on Interstate 5 near Kalama, Washington. The crash resulted in a fire that killed the driver, Lester Harvel, and his female passenger.
Although investigators established the driver's identity, they could not identify the woman.
She was subsequently buried in an unmarked grave in Longview, Washington.
For decades, investigators pursued leads without establishing her name. The case was revisited in 2014, when Washington State Patrol Detective Sergeant Stacy Moate began working to resolve the identification.
Investigators had previously developed a forensic sketch based on a witness's description. However, that information did not produce a confirmed identity.
As forensic DNA technology advanced, authorities worked with the Cowlitz County Coroner, forensic specialists, and other organizations to examine the woman's remains.
Conventional DNA profiling and database searches did not initially establish her identity.
In May 2022, forensic laboratory Othram developed an advanced genetic profile suitable for investigative genetic genealogy.
The resulting genetic information was used to investigate potential biological relationships through genealogical databases and family-history research.
Unlike conventional forensic DNA comparisons, which typically seek direct matches, investigative genetic genealogy can use more distant relatives to develop possible identities.
This process requires investigators to reconstruct family relationships and corroborate potential leads using independent evidence.
The investigation eventually directed detectives toward McCullough's relatives.
On August 6, 2026, Detective Sergeant Moate contacted a family member while following genealogical leads. The information provided by the family was consistent with the unidentified woman's history.
Subsequent DNA testing confirmed that the remains belonged to McCullough.
Her relatives had lost contact with her after she left Florida in 1991. They did not know she had travelled to Washington or died in the collision.
The identification finally established what had happened to her and allowed the family to make arrangements for her remains.
According to the Washington State Patrol, the investigation involved multiple organizations, including the Cowlitz County Coroner, the King County Medical Examiner's Office, Othram, and the Puyallup Tribe of Indians.
The case illustrates the value of preserving unidentified-person evidence and revisiting historical investigations as forensic methods improve.
However, the identification does not establish that genetic genealogy alone provided the final confirmation. Investigators also relied on additional DNA testing and corroborating information.
The publicly available reports do not disclose the complete sequencing workflow, statistical kinship results, or every laboratory confirmation procedure.
The investigation demonstrates how advanced forensic genetics and sustained investigative work can restore an identity even decades after a person's death.