CHELAN COUNTY, Wash. (Gray News) – Three young girls who were found dead Monday after leaving for a planned visit with their father likely died from asphyxiation, according to court documents.

The Wenatchee Police Department said 9-year-old Paityn Decker, 8-year-old Evelyn Decker, and 5-year-old Olivia Decker were found dead near the Rock Island Campground in Washington state on Monday.

Their father, 32-year-old Travis Decker, is still missing. He is wanted on three counts of first-degree murder and kidnapping charges.

Court documents obtained by KCPQ and KIRO say that the girls likely died from asphyxiation.

The sisters were last seen alive on Friday when they headed out with their dad for a planned visitation, according to Wenatchee police.

At the time the girls went missing,

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