It was organized crime who supplied the booze. In January of 1920 the American government banned the sale and supply of alcohol, the government thought that this would curb crime and violence, prohibition did not achieve it's goals, leading more toward higher crime rates and excessive violence. read more
An illustration of a Chicago speakeasy during the early 1900s during Prohibition . "The experienced criminal or the boy brought up in gang culture approaches his 'trouble with the law' as a matter which can be met in a thousand ways - there are friends and 'fixers', perjury, bribery and intimidation" (Landesco, 211). read more