Police

So far it is not very clear whether or not the World Government does have a worldwide police unit. In LogueTown we´ve seen police officers that ordered Luffy get off of the execution plattform. It is not clear if these was a police group that only exists in LogueTown or if there´s more places around the world that have them. In Cocoyashi-Village on the Conomi-Islands, Gen one of the residents had the same policemen uniform as the LogueTown policemen.

This is not hard enough evidence to jump to the conclusion there is a world wide police branch but at the same time it can´t be definetly ruled out that these policemen unit is stationed on more places then just LogueTown. As soon as the manga gives further info on this it will be updated here. But until it gets that far, the idea of a world wide police branch remains just a possibility