SWAT officers arrived and tried to talk the man out of the house, but received no response.
When officers eventually entered the house, they found the bodies of a 29-year-old man, a 33-year-old woman and their two children, a 2-year-old boy and a 4-year-old girl. All had gunshot wounds. The wife and children were in their beds.
The man was a member of the Air Force who was stationed at Joint Base Lewis-McChord. The family was from New Hampshire.
Police are investigating what events led up to the homicides. Troyer said there had been no previous police calls at that address.