Police and fire investigators finished collecting evidence at the scene of the New Years Day fire, Redmond police spokesman Greg Twentey said.
Were waiting for forensic evidence from the lab, Twentey said. Some of the forensic tests take a long time.
Investigators also continued to interview neighbors while trying to determine the cause of the fire that started in a first-floor apartment of a three-story wood-framed building in a complex in a wooded area just northwest of downtown Redmond.
Chandra Kroeckel of Colorado Springs, Colo., identified the oldest boy killed in the fire as her biological son, 12-year-old Tristan Thompson, The Seattle Times reported. She said the other boys were born to David Thompson and his wife Lilly Reasor, both in their early 30s.
David Thompson died in the blaze. Reasor was in stable condition at Evergreen Hospital Medical Center, hospital spokeswoman Sherry Grindeland said.
Kroeckel said the three other young victims were 6-year-old David, 4-year-old Leviticus and 2-year-old Wyatt.
A lot of wonderful lives were taken out of this world, she told the newspaper.
The fire was reported around 2:30 a.m. Saturday.

