ISTANBUL — According to state media reports, an American citizen of Turkish origin faces 15 years in prison after he surrendered to Turkish authorities last month over his role in founding a messaging app state officials say was used by supporters of a failed coup in 2016.
David Keynes, the alleged license holder for the ByLock app, reportedly turned himself in to Turkish authorities after arriving at Istanbul’s main airport on June 9, though news of his legal proceedings was initially made public Wednesday.