The mystery of what happened to a Puyallup trapper missing for more than 25 years is closer to being solved after a hiker found a partial skull in Lewis County.
Diana Robertson’s remains were found buried in the snow along a logging road between Elbe and Mineral on Feb. 18, 1986, two months after she and her boyfriend, Michael L. Riemer Jr., failed to return home from a trapping trip.
Nothing ever was heard from Riemer.
“The fact that we found him lets us know he’s not out there running around, but it doesn’t necessarily change what we have to work with to figure out what happened,” Stacy Brown of the Lewis County Sheriff’s Office said.
The partial skull was found March 26 within a mile of where Robertson’s body was discovered . The wooded area near Mineral was searched several times in the late 1980s.
A King County forensic pathologist used dental records to identify the remains as Riemer’s. It’s not known how long Riemer has been dead or what killed him, Brown said.
He has been considered a person of interest in Robertson’s slaying because he remained missing after she was found. More than two decades ago, however, friends and family members worried that he, too, was a victim of foul play.
A Pierce County sheriff’s detective is reviewing the case and will work with Lewis County investigators to try to solve the mystery.