Q May an Alderman in one Municipality also serve as Chief of Police in another Municipality?

A A person exercising core power of one branch of government may not hold a position in which that person also exercises core power of another branch of government. An Alderman exercises core power in the Legislative branch, while a police officer exercises core power in the Executive branch, so it violates the Separation of Powers Doctrine for an Alderman to simultaneously serve as a law enforcement officer. It does not matter that the positions are in two separate jurisdictions. (Attorney General’s Opinions to Ferguson, December 5, 2014)