Grandson of slain couple poses extreme danger; may be stockpiling weapons

Updated:

RENTON, Wash. - Police think a man who's a suspect in the slaying of his grandparents Friday may be trying to stockpile weapons.

 Police believe Michael Boysen, who goes by the name Chadd, may be driving the slain Fairwood couple’s red 2001 Chrysler 300 with Washington license plate 046-XXU and an American flag ribbon magnet on the back.

 Boysen’s grandparents, who were in their 80s, were killed at their home on the same day he was released from prison.  Police said there had been a welcome home party for Boysen at his grandparents' home that night.

 The bodies of the couple were found on Saturday by their daughter.

According to King County Sheriff John Urquhart, Boysen, who's been jailed six times, is trying to obtain weapons to kill corrections and law enforcement officers as well a citizens.

Police said Boysen searched the Internet for gun shows in the Pacific Northwest and Nevada shortly before or after the slayings.

"We don't want another Maurice Clemmons situation," said Urquhart in reference to threats against law enforcement.

His family members are in protective custody.

Those who knew Boysen said he was addicted to prescription drugs and went to prison for stealing from his family and local pharmacies.

Boysen was scheduled to begin treatment for prescription painkillers Monday.

Urquhart said Boysen poses an extreme risk to the public and police and wants to make sure no one sells him a weapon.

The U.S. Marshal's Fugitive Task Force is aiding in the search for Boysen and the Sheriff's Office has been in contact with border patrol officers to determine whether Boysen crossed into Canada.