"They were actually at my dad's house barbecuing and they were supposedly going home," said Josey Bourdeau, sister of Robert Spoon.
After that, her brother Robert Spoon vanished along with the Tilt brothers.
"I was concerned like Tuesday when I hadn't heard from him," she said. "But we gave them a couple of days and we called it in and reported it on Wednesday."
Monday, the family said Uintah County search and rescue focused on the Green River that runs near Vernal. This after spotting vehicle parts along the river bank.
"They found a car part but they're not sure if it went to the truck," said Bourdeau.