The three young sisters allegedly k!lled by their homeless father in Washington state likely di3d from asphyxiation.

The causes of d3ath for the Decker sisters — Paityn, 9, Evelyn, 8, and Olivia, 5 — were revealed in a preliminary report filed with the Chelan County Superior Court, according to a Fox 13 report published Tuesday.

The girls’ bodies were found around 5 p.m. Monday, close to their father’s white 2017 GMC Sierra truck near the Rock Island Campground in Wenatchee — about three hours east of Seattle.

(L-R) Olivia Decker, Paityn Decker, and Evelyn Decker.
(From left) Olivia Decker, Paityn Decker and Evelyn Decker.Wenatchee Police Department
AMBER alerts for the sisters were canceled late Monday before police confirmed the girls’ d3aths Tuesday morning.

Law enforcement continues the hunt for their dad and suspected k!ller, Travis Decker, who’s wanted for three counts of first-degree murd3r and first-degree kidnapping.

After Decker, 32, picked up the girls from their home on Friday, their mother, Whitney Decker, said calls to his phone went straight to voicemail after he was scheduled to return them. She immediately contacted the Wenatchee Police Department, concerned for their safety.

His truck was seen later that weekend in the west end of Leavenworth, triggering a police search in the wooded areas around the town.

Hours before the bodies were found, a warrant was issued for Decker’s arrest on three counts of first-degree custodial interference before the murd3r and kidnapping charges were added.

The sisters bodies were discovered near a campground in Wenatchee, Washington.
The sisters’ bodies were discovered near a campground in Wenatchee, Washington.Facebook/Whitney Decker
Decker — a military veteran with extensive training — is homeless and has been divorced from his children’s mother for several years.

He was known to stay at campgrounds and hotels in the local area with his dog.

Decker’s cellphone activity revealed he drove to and left the campground a day before kidnapping his daughters, court documents obtained by Fox 13 show.

The alleged k!ller’s truck was found with two bloody handprints. Blankets, food, car seats and a wallet were also found in his vehicle.

Police are continuing to search for the girls' father and suspected killer, Travis Caleb Decker.
Police are continuing to search for Travis Caleb Decker.AP
The campsite near the truck showed signs it had been recently used when police found it, according to the documents.

After the grim discovery of the sisters’ bodies, SWAT teams and federal agencies — including Homeland Security and the US Forest Service — descended on the area and began the search for Decker.

He is described as 5 feet 8, 190 pounds, with black hair and brown eyes. He was last seen wearing a light-colored shirt and dark shorts.

Although it is unknown whether Decker is armed, he may pose a significant threat if approached, authorities said.

Anyone who believes they may have seen Decker since Friday or knows his current whereabouts is urged to call 911 immediately. The public is advised not to attempt to contact or approach Decker.

Although it is unknown whether Decker is currently armed, he may pose a significant threat if approached
It’s unknown whether Decker is armed, but he may pose a significant threat if approached by members of the public.Facebook/Travis Decker
The girls’ mother issued a distressing appeal for her daughters’ safe return just hours before their bodies were found.

“I just want the girls back home safe and sound — that is the most important thing to me,” she said in an emailed statement to NCWLIFE.

“I am concerned about the safety and wellbeing of my girls and their dad. This is an unimaginable situation,” she said in the statement.

Whitney, who had sole custody of the children, had put together a parenting plan with her ex-husband after years of being divorced.

The girls’ mother, Whitney Decker (C), had said she was “concerned about the safety and wellbeing of my girls and their dad.”
The girls’ mother, Whitney Decker (center), had said she was “concerned about the safety and wellbeing of my girls and their dad.”Facebook/Whitney Decker
Decker was granted time to see his kids during specific hours every other weekend in the Wenatchee Valley area.

However, he was allegedly “quieter than usual” when he picked them up on Friday — something that is seen as “out of character,” according to court documents obtained by Fox 13.

The suspected murd3rer also allegedly discussed the possibility of giving up his dog due to his housing and financial struggles.

Whitney claimed that Decker was diagnosed with borderline personality disorder, according to the documents.

She suspected her ex-husband had not been taking medication for his condition, even though under the agreement they had for him to see his children, he was supposed to seek mental health treatment and anger management counseling.

Documents claim he had not followed through with treatment.