HAUNTING details have emerged about the crime scene where three young girls were found murdered.

Travis Decker, 32, left his dog behind at the campground where he allegedly suffocated his daughters to death.

The official cause of death for Paityn, 9, Evelyn, 8, and Olivia, 5, was confirmed to be suffocation in their autopsies, according to the Chelan County Sheriff’s Office.

They were found at a campground in a Washington state forest on June 2.

Decker still hasn’t been found after the manhunt for the suspect has now lasted for over a week.

Police released new details about the case to the public on Monday as they announced they’re handing the search over to the federal authorities.

A man’s blood was found at the crime scene, along with animal blood, cops said.

Officials also said they found Decker’s dog at the campground.