Why are the police called "12" in certain areas?

It derives from the term 10-12, a CB radio code which means that visitors are present and one should be discreet. 12 is the police. Shouting "TWELVE" will warn the presence of an officer approaching the scene of some illegal activity.

CB radio terminology and 10-codes are code words used to represent common phrases in voice communication, particularly by law enforcement and in Citizens' Band (CB) radio transmissions. The use of 10-codes originated in the early 1920's, when public safety radio was in its infancy and officers rarely had to communicate with officers outside their own department.

The most commonly used 10 codes are:

10-1: Receiving Poorly
10-4: Ok, Message Received
10-7: Out of Service, Leaving Air (you're going off the air)
10-8: In Service, subject to call (you're back on the air)
10-9: Repeat Message
10-10: Transmission Completed, Standing By (you'll be listening)
10-20: "What's your location?" or "My location is..." Commonly asked as "What's your 20?"

If you’re not sure whether the situation is a true emergency, officials recommend calling 911 and let the call-taker determine whether you need emergency help. Check out some guidelines on when to call 911 at 911.gov.

As people shop during the holiday season, Fort Smith police said they want to remind people to watch their belongings, as thieves target inattentive people during the holidays. Should someone fall victim to theft, police said not to panic and follow these steps as soon as possible shared by swtimes.com .

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