Law Enforcement Aircraft

Ok, lets get away from the military for a short while. Whats the most impressive aircraft you have seen in the service of a law enforcement agency. I don’t mean police forces or law enforcement agencies that have military aircraft assigned to a task force with them, eg F16s flying anti drug operations in South America or similar but aircraft that have been purchased for use by police forces for use in general law enforcement duties. Have you seen or heard of an unlikely aircraft being used, an aircraft that is just far too much for its purpose or something that is surprisingly well armed for no particular reason.