By Alaa Elassar, CNN

(CNN) — The last time Whitney Decker saw her three daughters, she gave them each a hug and kiss goodbye, not realizing it would be the last time she saw them alive.

The sisters, 5-year-old Olivia, 8-year-old Evelyn and 9-year-old Paityn Decker, were found suffocated to death at an abandoned campsite in Washington state on Monday, police said, sparking an intense manhunt for their father, Travis Decker.

Whitney had handed the girls over to Decker, 32, for their regularly scheduled custody visit on May 30, the Friday before the devastating discovery. Though the couple had been divorced for several years, they maintained communication as co-parents and friends, her attorney Arianna Cozart told CNN.

“We’ll see you at eight,” he last told Whitney, Cozart said. Whitney

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