In addition, besides the Maddox/Policeman McBride example, there are also many additional examples from the 1930s and 40s in which the cops were chased by the gangsters. The Chicago Outfit was probably one of the most "anarchist" crime families in the whole U.S. at the time, meaning some of these guys really hated their government, hence the killings of numerous Chicago politicians and government reps.

Mongol General: Conan, what is best in life?

Conan: To crush your enemies, see them driven before you, and to hear the lamentations of their women.