All I know is that when the government does something like this, it would be classified. When something is classified no one is authorized to talk about it, especially on the internet. Police stations would not be teaching something that is truly classified (as none of them possess government security clearances), therefore if it is being taught to police it is unclassified. If it is unclassified, the word gets out rather rapidly. So, either it is secret or it isn't, there is no in between.