An Oak Harbor woman and her father are accused of trying to conceal evidence after they ran over the body of a pedestrian who was hit and killed by a semi truck in Montana, according to court documents.

Wryan V. Young, 31, and her father, Westley L. Young, 50, were both charged in Park County with tampering with physical evidence for allegedly washing blood and human remains off their truck at a car wash, according to Park County Attorney Brett Linneweber.

Wryan Young was also charged in Sweet Grass County with failure to remain at the scene of a fatal accident.

Linneweber said Wryan Young is not accused of striking and killing the pedestrian, just running over the remains.

Nobody is charged in the apparent hit-and-run.

Elgie Bedford, 81, of Wasilla, Alaska, was struck and killed near Big Timber in Montana. His body was found on a highway in the morning of Sept. 30.

Later that day, a resident reported finding a body part, later identified as belonging to Bedford, at a Livingston car wash, according to the affidavit of probable cause.

A clerk at a gas station reported that the driver of a black pickup pulling a trailer asked for the location of a car wash in the early morning hours. The driver, later identified as Wryan Young, said she ran over furniture and that material was hanging underneath the truck, the court document states.

A trooper with the Montana State Patrol was able to obtain the license plate number of the truck from security video and identified the Youngs from department of motor vehicle records.

The trooper asked Lt. Mike Hawley with the Island County Sheriff’s Office to contact the Youngs at their Oak Harbor home last month.

“Lt. Hawley observed that terror crossed Wryan’s face” when he showed up at the house, the trooper wrote in the report.

She went into the house and yelled, “Mom, Dad, the police are here about Montana.”

Wryan Young allegedly admitted she was driving the truck in Montana, court documents state.

Westley Young told Hawley that a semi truck ahead of them “hit the guy first,” the report alleges.

The Washington State Patrol seized Young’s truck for testing.

Court documents allege that human tissue and bone were found on the undercarriage.

The Youngs were given summons on Tuesday to appear at a Dec. 9 court hearing, Linneweber said.