The top special agent overseeing the FBI’s largest field office has been forced to retire, according to an email he sent to colleagues and obtained by CNN.

The top FBI agent in New York was ousted Monday, saying he wasn’t given any explanation for the decision from Washington. James Dennehy, a US Marine Corps veteran who joined the bureau after the Sept.

James Dennehy, the head of the FBI's New York office, is out one month after he urged colleagues to “dig in” after the new administration requested the names of all agents who worked on Capitol riot cases.