This guy has done a good job on this, I would make sure you have this as a reference. In cases of EP work if you can see someone violating laws out in the crowd you maybe able to get Law Enforcement to work them for you. But you need to know the laws. If you carry knives as weapons it is also good to know what you can get locked up for.
from CTI Consulting http://ift.tt/2ir7q00