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Investigators with the King County Sheriff’s Office believe it was the adult son of a Sammamish couple who likely killed his parents last week before turning the gun on himself.

Deputies were called to the home in the 24000 block of Northeast 30th Place in the Broadmoore Estates on Saturday because the father had missed an appointment earlier in the day.

The house was locked, according to Sheriff’s Sgt. Cindi West, but three bodies could be seen on the floor through a window.

Once inside, investigators found a gun nearby, she said.

The names of the family members have not been released.

 Information from The Seattle Times archives was included in this report.