LINCOLN CITY, Ore. -- A suspect in a Washington double murder was arrested Tuesday evening after a day-long standoff at a motel with tactical police.

Michael Boysen, 26, was taken from the Westshore OceanFront Suites by ambulance in critical condition and airlifted to a Portland hospital where he was listed in serious condition Wednesday morning.

Police entered his second-story room in the early evening.

He was already on the ground, injured with self-inflicted wounds, said Keith Kilian of the Lincoln City police department.

A witness, Jeff Gregg, told KGW that officers approached the room walking. It was real calm and smooth, he said. They walked in. There was no running whatsoever. Heard some crashing when they went it.

Boysen had been the subject of a multi-state manhunt since Saturday, when the bodies of his grandparents were found in their suburban Seattle home. Washington state authorities have said Boysen killed the couple the day after they threw a welcome home party for him after his release from prison.

Three loud bangs were heard at the hotel in the afternoon. Kilian said officers caused them, although he wouldn't elaborate on how exactly the noise was made.

Authorities said Boysen checked into the motel Monday night under his own name. But the name wasn't recognized until Tuesday morning, when a desk clerk arrived who had watched the news.

Hotel guest Jonathan Maglecic was staying in the next room and spoke with Boysen the night before. Nothing about the double-murder suspect seemed out of the ordinary, he told KGW.

Background: Wash. man wanted in connection with grandparents' deaths

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