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Missing North Dakota woman’s death an accident, authorities say after vehicle, prosthetic discovered in Idaho

More than three and a half years after her disappearance, Idaho law enforcement officials have discovered items belonging to a missing Ardoch, N.D. woman and no foul play is suspected in her disappearance.

A prosthetic knee and a vehicle belonging to Florence Dumontet, who went missing in Oct. 2011, were discovered last week in Shoshone County, Idaho, the Grand Forks County Sheriff's Office announced Monday. Human remains were also found.

Dumontet went missing during an annual trip from North Dakota to Washington state to visit family and friends.

Law enforcement officials also believe no foul play led to Dumontet’s disappearance and at this time they are ruling her death an accident.

The Shoshone County Sheriff’s Office told the Grand Forks County Sheriff’s Office on Thursday that hikers found a prosthetic knee with a serial number matching one belonging to Dumontet, who went missing during a trip from North Dakota to Washington state.

Idaho law enforcement officials then flew a helicopter in the area where the prosthetic was discovered and found Dumontet’s vehicle about 500 yards away from the road down a steep cliff.

Dumontet, who was 82 at the time of her disappearance, was on her way to visit family and friends in Shelton, Wash., a town in the state’s Olympic Peninsula. Dumontet made the trek annually more than a dozen times.

According to previous Herald reporting, Dumontet was driving a black 2008 Lincoln Mark LT crew cab pickup and was spotted fueling up her truck at 7:22 a.m. Oct. 16 at Simonson’s on Gateway Drive in Grand Forks.

Accompanied by her cream-colored poodle, Peaches, Dumontet then was seen leaving a gas station off Interstate 90 in Butte, Mont. at 9:22 p.m. The following morning at around 10 a.m., a manager at Muralt’s Travel Plaza in Missoula, Mont., said he spotted Dumontet and told authorities the North Dakota native was having trouble with her pickup.

The manager told authorities Dumontet was having trouble with her pickup.

Ardoch, N.D., is located 28 miles northwest of Grand Forks.