SEATTLE (AP) - The King County sheriff's office in Seattle says the grandparents of a man accused of killing them were strangled. Sgt. Cindi West says the King County medical examiner's office determined the cause of death for 82-year-old Robert Taylor and 80-year-old Norma Taylor was strangulation. Authorities have accused 26-year-old Michael Chadd Boysen of killing the couple after they held a party for him Friday to welcome him home from prison. Boysen was arrested Tuesday after a daylong standoff at a motel in Lincoln City, Ore. He's in a Portland, Ore., hospital with self-inflicted cuts. West says he's in serious condition and is conscious.(Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)

