Federal authorities have identified a Coptic Christian in southern California who is on probation after his conviction for financial crimes as the key figure behind the anti-Muslim film that ignited mob violence against U.S. embassies across the Mideast, a U.S. law enforcement official told The Associated Press on Thursday. The official said authorities had concluded that Nakoula Basseley Nakoula, 55, was behind “Innocence of Muslims,” a film that denigrated Islam and the prophet Muhammad and sparked protests earlier this week in Egypt, Libya and most recently in Yemen. It was not immediately clear whether Nakoula was the target of a...