Alderney State Police is the police force that patrols the state of Alderney in GTA IV and its DLC. They are not part of the LCPD or have any connection to them even though there patrol cars have the LCPD colors and name.
There are two types of officers and both are fit and are white males. There are no specific Alderney state police officers mentioned or that play a big role in GTA IV. The police of the Alderney state police department resemble those of the New Jersey state police department with their hats and uniforms. The police patches on there arms read Alderney State police in the same patch of the New Jersey state police .
There are a total of three police stations in Alderney, one is a mini police station located in Acter, Alderney. Unlike the LCPD it is noticed that they seem to have more patrols on the highway system known as Plumbers Skyway. This is possibly due to the fact that there is more highway then in Liberty City across the West River. Or it is likely Rockstar created the police alI for Alderney to spawn more on the skyway due to them being state police. If the player gets arrested by them, the same things will happen with the LCPD occur. They take your weapons and process you at the nearest police station.