Royce J. Johnson is an American actor, screenwriter, and filmmaker born in New Orleans, Louisiana. Although his exact date of birth has not been publicly verified, he graduated from Warren Easton High School in 1990 before beginning his acting career in New York, where he trained and steadily built a reputation as a dependable television character actor. After making his screen debut in the early 2000s, Johnson appeared in numerous series including Third Watch, Law & Order, Law & Order: Criminal Intent, Person of Interest, Gossip Girl, The Blacklist, Blindspot, FBI, and For Life. He is best known for portraying Detective Sergeant Brett Mahoney in Marvel's Netflix television universe, appearing in Daredevil, Jessica Jones, The Punisher, and later reprising the role in Daredevil: Born Again. Unlike many officers within the NYPD portrayed in the series, Mahoney is an honest policeman who gradually becomes an important ally of Matt Murdock, Foggy Nelson, Karen Page, and Daredevil in their fight against Wilson Fisk's criminal empire. Johnson has also worked behind the camera as a writer and filmmaker, establishing a career defined by understated, believable performances across crime dramas and action series.