C.E. Evans wrote:
It fits all right, but it can vary from city to city.
In some cities:
Chief of Police (or Police Commissioner)
Other cities may include or substitute ranks with Sheriff, Commander, Inspector, Deputy, and more. Other cities have different placement of ranks, placing Detective higher in their chain of command than in others.
Right, but those are just titles. There is not a distinction between police officers who hold commissions and those who don't.