This is another “forgotten” bit of policing history (1932), and the presidency of Herbert Hoover.

https://daily.jstor.org/how-tear-gas-became-a-staple-of-american-law-enforcement/
The history of tear gas used against U.S. public
This is another “forgotten” bit of policing history (1932), and the presidency of Herbert Hoover.
https://daily.jstor.org/how-tear-gas-became-a-staple-of-american-law-enforcement/