NTSB investigators arrived in Portland, Oregon, on Saturday to begin their investigation into what happened on Alaska Flight 1282.

“I found a phone sitting on the side of the road that had apparently fallen 16,000 feet,” Bates said in a video recorded for social media Sunday.

He said he was “a little skeptical” when he first found it, thinking perhaps it may have been tossed out of a passing vehicle. But the phone wasn’t locked, so he opened it up, he said.

“It was in airplane mode with a travel confirmation and baggage claim for Alaska 1282,” Bates said. “So, I had to go call the NTSB.”