I somewhat agree, though it is possible that Rockstar were unable to create a separate squad car for the Alderney State Police for some reason (time constraints, for example).
EDIT: I have decided to remove the note that the L.C.P.D. have no connection to the A.S.P. Please see the summary of my edit dated 23:00, 5 August 2015 for more information.
ASP and the TBoGT Multiplayer Vehicles
Police Buffalo, Bike and Stinger use by the ASP: The Police Buffalo, Bike and Stinger are listed under the LCPD page, but they also spawn in front of the ASP station in Leftwood. I'm listing them as ASP vehicles for now.