How did making alcohol illegal open the doors for organized crime in America?

The effect the Mafia had in crimes such as killing also rose during prohibition. From 1920-1930, the murder rate grew 78%. On a national level the murder rate per 100,000 people rose almost two thirds. ... Due to much of the crime going on in society, corruption was very prevalent in this time of America.

what are local authorities doing to fix the problem

explanation:

in february 1787, congress decided that a convention should be convened to revise the articles of confederation, the nation’s first constitution. in may, 55 delegates came to philadelphia, and the constitutional convention began. debates erupted over representation in congress, over slavery, and over the new executive branch. the debates continued through four hot and muggy months. but eventually the delegates reached compromises, and on september 17, they produced the u.s. constitution, replacing the articles with the governing document that has functioned effectively for more than 200 years.