During a simple family outing for seashells on a Northern California beach, an unexpected find has brought resolution to a long-standing mystery—one so peculiar that it involved identifying the same individual twice, according to investigators.

In 2022, human remains discovered at Salmon Creek State Beach in Sonoma County were confirmed to belong to Walter Karl Kinney, a 59-year-old former banker from Santa Rosa who disappeared in 1999. This confirmation came through collaboration between the DNA Doe Project and local law enforcement.

The plot thickened with a surprising twist unearthed by investigators.

It turns out that parts of Kinney’s remains had been discovered and identified years earlier. This makes it a unique case where a single individual was identified in two separate investigations, spread across decades.

Walter Karl Kinney, once a banker in Santa Rosa, had vanished in 1999. His remains were later identified through DNA analysis after being found on a Northern California beach. (DNA Doe Project/Sonoma County Sheriff’s Office)

“This case was extraordinary—it’s rare to encounter someone classified as a John Doe on two occasions,” stated Traci Onders, a team leader with the DNA Doe Project, on the organization’s website. “However, with the help of investigative genetic genealogy, we could solve this mystery and offer closure to everyone connected to this case.”

The latest break in the case traces back to June 17, 2022, when a family walking along Salmon Creek Beach spotted a single long bone protruding from the sand. 

The surf along Sonoma Coast State Beach at Gibson Beach is viewed during a stormy afternoon on May 5, 2017, near Bodega Bay, California. (George Rose/Getty Images)

The bone, believed to be part of a leg and containing surgical hardware, offered one of the only initial clues. A search of the surrounding area did not uncover any additional remains.

With few leads, the Sonoma County Sheriff’s Office partnered with the DNA Doe Project, a nonprofit specializing in identifying unknown remains through genetic genealogy. 

A DNA profile was developed and uploaded to a genealogy database in early 2026, allowing volunteer researchers to begin building out family connections.

Within just over a week, the team zeroed in on Kinney.

Coast Guard cadets run along Salmon Creek Beach in Bodega Bay, California, along the Sonoma County coastline where human remains were discovered years later.

As researchers dug deeper, they uncovered a key link to a separate case from 1999, when partial human remains washed ashore just a few miles away in Bodega Bay. Those remains were identified in 2003 as Kinney using X-ray records after his daughter came forward.

Kinney, who was born in 1940, had been living in Santa Rosa at the time of his disappearance. His daughter previously described him as “smart, sensitive, almost to a fault,” adding that “this world was just too harsh a place for him.”

Authorities have not released a cause or manner of death, and it remains unclear how Kinney’s remains became separated and discovered decades apart.

Officials also have not said whether the case remains open or if the investigation has been formally closed.

Fox News Digital reached out to the Sonoma County Sheriff’s Office for comment. 

Stepheny Price covers crime, including missing persons, homicides and migrant crime. Send story tips to stepheny.price@fox.com.