Detective Brett Mahoney is a New York City Police Department officer and childhood friend of Foggy Nelson. As a police sergeant, Mahoney assisted Nelson and Murdock in bringing down a crime Kingpin named Wilson Fisk, as well as briefly encountering the villainous Kilgrave and anti-hero Jessica Jones. Upon arresting the Punisher, though it was Daredevil that did the deed, Mahoney was promoted to a detective.