![Inventor John T. Thompson with his innovative “trench broom.” Below left, Chicago, Illinois, mapped to show which gangs ruled where. (Bettmann/Getty Images)](https://www.historynet.com/wp-content/uploads/2021/08/Johnson-T-Thompson-Tommy-Gun-Inventor.jpg)
Inventor John T. Thompson with his innovative “trench broom.” Below left, Chicago, Illinois, mapped to show which gangs ruled where. (Bettmann/Getty Images)
Bettmann/Getty Images
Inventor John T. Thompson with his innovative “trench broom.” Below left, Chicago, Illinois, mapped to show which gangs ruled where. (Bettmann/Getty Images)
Bettmann/Getty Images