Autopsy Results Released for Decker Sisters, Who Police Believe Were Killed by Dad. The bodies of Paityn Decker, 9, Evelyn Decker, 8, and Olivia Decker, 5, were found on June 2 — three days after they were last seen with their father, Travis Decker, who remains missing. Authorities have announced the official causes of death for three girls who were alleged to have been killed by their father. Paityn Decker, 9, Evelyn Decker, 8, and Olivia Decker, 5, were found dead near the Rock Island Campground in Chelan County, Wash., on June 2, the Chelan County Sheriff's Office previously said. The girls were reported missing on May 30 after they had not returned from a planned visitation with their father, 32-year-old Travis Decker. In a press release shared with PEOPLE on Monday, June 9, the CCSO said an autopsy was completed by the medical examiner on Friday, June 6. "The cause of death was determined to be suffocation, and the manner of death was determined to be homicide," the release states. The girls' bodies were located after authorities found Travis' pickup truck, in which the sheriff's office said investigators have since collected a "large amount of evidence" including many of his personal items, per the release. "The suspect’s dog was recovered and turned over to the humane society for safe care," the CCSO added. "Blood samples taken from the scene have come back positive for belonging to a male, and another was not human blood. Further DNA and fingerprint analyses are still being conducted." Travis remains missing and is wanted on charges of murder, kidnapping and custodial interference. As of 6 p.m. local time on Sunday, June 8, the CCSO handed over the search efforts for Travis to federal authorities but noted they are still leading the criminal investigation. "We had reached a point where we need to rest our local resources. Our command staff continues to be engaged with the search command while we give our teams time off to rest and recuperate and be ready to rejoin the search for, and capture of, the suspect," the release states.