Prohibition and Crimes
Prohibition did increase the crime rate during 1920s. Criminals and gangsters tried to find way to gain money by selling alcohol for a higher prize. The criminals and gangsters got richer, and they became more powerful, no one dared to stop them once they were armed with guns. Whenever police caught these gangs, the gangs often bribed or killed the police.
Sometimes the police or the officers could be bought for the right prize to become one of the gangsters. And even some governments threw parties with alcoholic beverages.
The criminals and gangsters ran the speakeasies, they bribed police or they had either police or officials as their spies.