David Kenney, 37, was trying to get out of Alaska Friday when he was caught at the Anchorage airport, about to board a flight, the Anchorage Daily News reported.
He was jailed on a charge of hindering prosecution in the death of Benjamin Kaiser, 19, who was found dead in Bethel Wednesday.
Bethel police said Kenney did not tell them he had seen a bludgeoned Kaiser bound to a table before investigators, acting on another tip, found the body.
Jeffrey Hout and Harry Williams of Bethel are charged with first-degree murder, court papers reveal. Police say they beat the teen with multiple blunt objects because they thought he knew the whereabouts of a missing truck.
Police said they contacted Kenney 36 hours after he had seen the victim, but he initially denied any knowledge. He eventually admitted the missing truck was his and that he had seen Kaiser tied to the table.
Kenney called Hout and Williams Tuesday asking about Kaiser's condition, but he did not report the crime while the victim was still alive, police said.
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