A pioneer for females in law enforcement, Mary Shanley joined the NYPD in 1931, quickly becoming a Gotham all-star and tabloid sensation. Making a staggering 1000 career arrests, she became the 4th woman in history to make detective 1st grade, and then nearly lost it all. Dead Shot Mary grapples with the legend of Mary Shanley, a trail blazer, a maverick, and a true New York original.