New York

By the Old Grey Lady's young inter-nerds, this handsome murder map geolocates all 3,406 NYC homicides since 2003, with grisly particulars broken down via year, borough, or hood. Roll over a dot to see deets (victim & perp, primary motive, weapon, date), or view murders cross-referenced into categories, including month and time of day (10% in June, 66% at night), age/sex/race, and weapon used, e.g., 69% firearms, 23% knife, and 8% "other" -- which could refer to those scared to death while browsing 3,406 NYC homicides since 2003.