Investigators have recovered a significant amount of evidence from the crime scene, including many of the suspect’s personal items found inside a recovered truck.
The suspect’s dog was also found and has since been turned over to a local humane society.
Forensic testing confirmed that blood samples collected from the scene included one that matched a male and another that did not come from a human.
Additional DNA and fingerprint testing is still underway.
An autopsy completed Friday also confirmed the cause of deaths as suffocation and ruled the manner of deaths a homicide.
The Chelan County coroner also confirmed the girls died the night deputies say Decker picked them up.
The sheriff’s office acknowledged public frustration over the limited release of information, but said some investigative details must be kept confidential to protect the integrity of the case.
The Chelan County Sheriff’s Office announced Monday that forensic analysis of crime scene evidence is beginning to yield important insights in the search for the suspect, but has also led to new questions.
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