This link will show you the shield on the door of a Mercedes-Benz "police" vehicle owned by "American Police Force" which is a private military contractor operating in Hardin, Montana. Please review some of the previous post we have listed on our blog about them, paying close attention to the youtube videos about the organization and what it is doing in the Hardin Montana area.
This second link shows where the emblem comes from. Serbia. Is this proof of foreign troops on U.S. soil?