Press release:

King County Sheriff’s detectives said murder suspect Michael (Chadd) Boysen spent Saturday night in a Tukwila hotel room after killing his grandparents.

On Monday, King County Sheriff’s detectives learned that Boysen had used his real name to check into the Extended Stay America in the 15600 block of West Valley Highway Saturday afternoon and had spent one night before leaving.

On Tuesday morning a clerk at the West Shore Hotel in Lincoln City, Oregon alerted police that Boysen had checked into that hotel late Monday night.

Oregon officials took Boysen into custody Tuesday night after a long standoff. Boysen is currently in custody and being treated at the Legacy Emanuel Hospital in Portland for what appears to be self inflicted cuts. His condition has been upgraded to “serious.”

King County Sheriff’s Detectives have been in Oregon since Tuesday working on the investigation. While at the scene of the standoff, detectives also learned that Oregon State Police had located the murder victim’s missing car in a Wal-Mart parking lot in Salem, Oregon on Tuesday. Detectives learned that Boysen had dumped the victim’s car in the Wal-Mart parking lot and paid cash for a used Ford Taurus at a nearby used car lot.

Detectives are declining to share information about the homicide crime scene but said the “cause of death” will likely be released by the King County Medical Examiner’s Office on Thursday afternoon.

Boysen will stay in Oregon until he is extradited back to Washington.