school shooting information might be the best intro for this one;

Report Highlights: School shootings are more prevalent after sweeping gun-free legislation than before.

• There has been a 200% increase in targeted school shootings since the Gun-Free School Zones Act (GFSA) of 1990.
• 67% of states where districts can arm teachers have had no targeted shootings at schools since passing the legislation (GFSA).
• There has been a 327% increase in shooting incidents on or near school campuses since 1990.......more.........