The head of the FBI's Chicago field office is abruptly leaving his position, according to a resignation message he sent to colleagues—and sources who say he was told to retire. Douglas DePodesta has served as special agent in charge in Chicago, one of the FBI's largest offices, for nearly two years and has been with the bureau since 2002. He told colleagues that his last day would be Monday. Multiple people familiar with the matter, speaking on condition of anonymity to discuss a personnel move, told the AP DePodesta had been pushed to retire.