Software not Hardware.
I strongly suggest, getting hard copies of State Statues , and taking a real good hard look at the use of lethal force, definitions of shoplifting, false arrest... taking a training class, sitting in on some Criminal Justice Classes,attending some jury trials, asking a seasoned LEO , seasoned Retired LEO, seasoned Insurance Investigator...to do a walk thru and make determinations of weak , vulnerable security and how to be less Vulnerable.
Have and use code and passwords.
I know a LOT about this.
If an employee mentioned in a calm, controlled tone, the vet called to say my cat was fine - all hell might be about to break loose. I do not have a cat, I hate cats.
If someone "yelled" - it meant they busted the coffee pot in the sink, got mustard on a silk blouse or me cussing because I was pissed at some Political Idiot heard on the news - or Pissed the Damn Delivery Folks screwed up royally.
Calm, cool, "phrases, passwords, codewords" used when serious matters needed to be addressed.
"Oh phooey!" is what my elder saleslady / bookeep helper said, in a normal tone of voice when she caught the trash can on fire ( her job to do B-day candles) ...just sat in the sink and used a sprayer extension to put it out. Asked why she didn't use the little fire extinguisher " damn things get crap everywhere, not to mention $8.99 plus tax...I'd rather use that money for you to buy me lunch". [she meant it too]
When I was married and had a stepson. If the calm mention of my daughter called from school - All eyes up front and all employees took the actions we had practiced over and over and over again.
If that light fixture went out up front and in view of everyone - it was supposed to - it signaled a problem. Again pre-planned actions went into play.
If another light came ON up front / elsewheres- it meant the business guy next door had a situation and we were to cover his six, call LEO on direct line and do whatever we could to help, observe and to watch our business in case this was a diversion.
If I mentioned in calm casual voice " How is the wife/ hubby doing" - that told the widow/ widower to proceed with our pre- planned trained repsonses.
We also had methods to inform others not in view of front. Like the business next door ...reciprocal is good.
What if the 'shoplifter' was actually a decoy? I mean his "role" was get attention, maybe even put back the noise filter, and run. One of you chases him, leaving less folks to watch store. Now the armed BGS have everyone in a bunch, and under their control.
Oh yeah, I studied this real hard.
I was born into this 'world' . We did not have 911. We had black rotary phones. Ask me about hiding in the broom closet and calling the Local cops on direct line at age 8. Yeah, we had a hardwired phone in a closet. My job was to hide and call.
Didn't have CCW permits. I damn sure had a loaded Model 10 in my workbench at age 13, the pump shotgun behind the doors I had trained with as well...it was kid sized for a reason. I hear a shot up front, I hit the deck, get below the concrete and steel cover built into the "shop" and I did not come out until the code words for all clear were given. Another hidden hardwired rotary phone(s) with an unlisted number were in "unique" places.
Check the stats for yelling "shoplifter" and the person has NO stolen good on his person.
Ask me about someone that sweated whom called a person a shoplifter. Seasoned LEO, detective showed up as asked. Professional Shoplifter did NOT have the Mdse. The Mdse was gone. Seasoned detective knew how to listen to not what said, but read a person and read body language.
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Difference in Wannabe's and Pros. True Case.
Professional Shoplifters.
Lady came in and wanted to look at Loose diamonds with her son - he was getting engaged. Attractive lady, dressed in very expensive clothes, wearing expensive Jlry. She produced a picture of a mounting , while the 2ct diamonds were on the desk, "oops" she spilled her lipstick and it rolled under the desk. She pawned a 2 ct diamond when the Jeweler bend down to retrieve the lipstick.
Diamond is missing, where is it? Where did it go? Only 3 persons in that private showing room.
Husband was late " caught in traffic" and was eating a apple. Lady greets husband, son is asked to "stay seated" - that dia is still missing, must be the kid - right? Wrong, he did not have it.
Husband calls the "family attorney" he is "outraged". He has that apple, a few bites were out when he entered, wifey fussed about being so "tacky" - he replies he missed lunch...
Husband declined to toss apple into trash can when small trash can is offered. !!Click!!
Seasoned Detective, called upon request of Jlr, other officers watching the outside...might be a diversion for folks next door...
Seasoned Detective - "Sir, since you and your family are waiting for your attorney, and since you claim innocence...please toss the apple. He finally tossed the apple. Very neatly a hole and plug in that apple...2ct dia in that apple. The Jlr got his diamond back and not charged with false arrest. It was close though, so very very close.
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They can have any damn thing in the store, that is what insurance is for. Now hurt one of the employees, produce any weapon with intent to hurt an employee, attempt to take them as hostage...nobody was gonna be a hostage. Nobody, especially one of the younger ladies was going to a back room with a BG(s) alone and get raped. They set a trash can on fire to distract.. Their ass is mine, or ours. Legal Definitions gave me the right to prevent a felony. Desparity gave me rights as well.
There is more to responsible firearm ownership than firearms.