RAPID CITY, S.D. — The Pennington County Sheriff's Office has identified badly decomposed human remains found northwest of Pactola Reservoir as a 53-year-old man missing since June 2012 from Seattle.

The sheriff's office says no foul play is suspected in the death of Reginald E. Henrickson. Henrickson is originally from Minnesota with last known residences in Alaska and the Philippines.

The remains had been spotted near Kelly Gulch by an ATV driver last Tuesday, but searchers could not find the exact location that night. Crews returned the next morning and found the remains. An autopsy found no signs of trauma but could not determine a cause of death.

Other evidence on scene led investigators to contact Seattle authorities, and dental records were examined.

The investigation is ongoing.