The Phoenix Joint Terrorism task force produced a flyer a few years ago that was just released.
It states "Domestic terrorism is defined as: Groups or individuals, operating entirely inside the US, attempting to influence the US government or population to effect political or social change by engaging in criminal activity." "If you encounter any of the following call the Joint Terrorism Task Force"
The list of things to look for includes:
request authority for stop
make numerous references to US Constitution
see for yourself