Emad Matti had not received a photograph of the hostages. Two months had passed, and several Iraqi Christian families that had been detained by the Islamic State in an old folks’ home in Mosul were still imprisoned. From Kirkuk, Matti had been transferring $500 each month to a bank to feed the families, and he was afraid that they were dead, or that his informant in Mosul, one of their captors, was planning to prolong their imprisonment and collect even more money before demanding an impossible sum to drop them at the Kurdish border. For now, though, Matti just…