This is an article from Robert Rail, PhD. He donated this section of his book "The Unspoken Dialogue," as a tool to keep our cops safe. Pass the information on and use to teach your next law enforcement audience.
“Carrying contraband or carrying something hazardous to public safety will be different than how a person carries routine items or packages. The differences we look for are very clear and very obvious once you know what they are.” Full Article at www.PhalanxLE.com.
If you see Dr. Rail make sure to thank him for his decades of commitment to law enforcement training. He is also the author of "Surviving the International War Zone."