Authorities in Washington state recently found the remains of a missing grandmother buried under a shed and partially encased in concrete.

The shocking discovery came after Marcia Norman, 82, was reported missing to the Thurston County Sheriff’s Office (TCSO) by her family April 4.

Relatives told the sheriff’s office they had not heard from her since April 1, and her cars were still parked at her house, according to a statement from TCSO.

A person of interest in Norman’s disappearance was extradited to Washington. (Getty Images)

Montana authorities arrested him for the violation at a motel in Missoula, and he was later extradited to Washington.

“Zizz remains the primary person of interest in the ongoing investigation, and detectives are continuing to work closely with both the Thurston County Prosecutor’s and Coroner’s offices,” sheriff’s office officials wrote in the statement.

Zizz remains in the Thurston County Jail on a no-bail hold while authorities continue gathering evidence, but, as of Wednesday, he had not been charged in Norman’s disappearance.