John Marshall Metropolitan High School is a West Side institution. One of the city’s oldest public high schools — once heavily Jewish and for decades home to a nearly all-Black student body — it boasts fiercely proud alumni and a reputation for powerhouse athletics. It’s named for the fourth chief justice of the United States Supreme Court, widely regarded as the most influential leader of the nation’s highest court, honored with his face on postage stamps and his name on law schools in Chicago and elsewhere. Marshall also was a slaveholder his entire adult life, with at least 200 Black slaves on his Virginia plantations.