I don't think police issue subpoenas. They may be able to acquire a warrant to force google to turn over data, but would they actually do it? They would certain

I don't think police issue subpoenas. They may be able to acquire a warrant to force google to turn over data, but would they actually do it? They would certainly require some sort of preliminary evidence or probable cause. Of course your attorney could file an action against google (or another party) and a court could subpoena google's records to resolve it, but that's starting to sound expensive...