The S.U.A. or The Supernatural Unit of America is a large government organization that deals with the human government in unison with the supernatural one. The S.U.A is the branch that is scattered around the United States and is connected to several other branches around the world.
This form of government works in tandem with the human government but it is extremely complex and secretive so the lives of the supernatural aren't exposed. The S.U.A. deals in disasters or public disturbances that deal with the supernatural. From rising diseases to more close investigations, the S.U.A will most likely be there to pick up the mess.
This branch of law also deals in arrests and even executions (humane;injections) to those who try to expose the supernatural world in extreme measures.
Even though the S.U.A has connections to the human government and overall is ruled over by the human government they do have the authority to check anything of high suspicion with warrants and random drop ins.The S.U.A. consists of those who go in to packs, groups, or any sort of collected kind of supernatural when it is needed. All that they do is lawful. There are also those sent to investigations or those who are attempting to close down any form of criminal activity within the supernatural world.
An S.U.A. member can be brought in to this branch by the government seeking them out, a person signing up to join, or in some special cases a baby is born to be molded in to this form of government.