Model of Criminal defines firearm use.
You have some Professional Thugs using Glock 10mms.
I assure you they know how to run the gun. They have the nice belts, holsters, mag pouches and can do a fast reload.
You have your upper level criminal that may carry a .40cal, be it Glock, HK, Sig, etc. Again these folks, both ladies and gents have belts, holsters, mag pouches, and can run the gun.
Have you ever seen either of these groups run a gun? I have.
You would think you were at a IDPA/IPSC match.
To keep it in layman terms...
Gangbanger with a "nine". Everything is a "nine" even if not a 9mm.
Firepower, show of strength and other reasons for "leaving the brass to scare your arse".
Now teh Intraw3bz does not always want to hear how a Pro, Upper Level, and "Street Thug" can take a screwdriver and take someone out with a tricked out gun and knife that is popular on teh Intraw3bz.
That RG 38spl will take you down too. Like the screwdriver, it is disposable.
Take down the mark, and toss it in dumpster, a train sitting on a track, in the river...
There exists "codes" and it might be illegal cock fights, protection money for an area, initiation rites...etc.
Sometimes brass is left to send a message.
Sometimes brass is not left to send a message.
There is a real world out there, from street level on up to Pros.
The EMT, and later ER/ED might have a "hunting accident" where a .22 rim-fire hit another while raccoon hunting at night, or ridding property of a armadillo.
The real reason is the person was behind on illegal cockfight, dawg fight, or some other gambling debt.
"Gun Cleaning" accident, might be a drug related deal.
Bond Daddy with the Rolexes and cocaine had some interesting "accidents" and knife cuts.
A trophy wife/ girlfriend might of somehow cut her breast with a knife cooking supper, or it might have been the dude supplying the blow, and this was a reminder the payment for dope was going to be on time.
Or, trophy wife / girlfriend was going to be a sex toy for some fellas, and some gals, to get that debt paid, slice that breast as a reminder of what will happen next time.
With a revolver at your head, and the other person being held, a gun will accidentally go off and its put down as "gun cleaning and accidental", or wife, girlfriend was in the kitchen with no top, or bra and lost control of knife.
A homeless gal, or guy, just wants a warm place, or food, or even bus ticket.
A revolver might be the ticket, after they fire some rounds and then toss the gun away.
Shoot out some store fronts, cops converge on that part of town while the real crime is done in another.
You can live in cyber space and paint all good guys with guns being hip, slick, cool and can't be beat.
In the real world, you cannot paint all "criminals" with a broad brush dipped in 'stupid'.
There are various models of criminals.
Some will take you down before you know you are down with a screwdriver.
Some use the same tactic as hi-risk folks with Security Dawgs, specially trained to protect the principal.
Some models of criminals have their own trained dawgs.
You get cute with your Glock 26 and laser sight, and those dawgs are trained to take down whatever is holding that red sight.
They train them with laser pointers to take down marks .
You cannot paint all "criminals" with the same brush, as there are more than Model of criminal.
Re: Body Armor.
I laugh every time I read of some armchair ranger and body armor.
Street people have had body armor for ages, both the good guys and bad guys.
Ask any seasoned street Cop, if he/she gets a bit nervous about having to deal with street folks.
The seasoned cops knows to respect these folks.
Layered clothing with pockets.
These folks carry what they own, especially valuables on person. Pockets conceal these, and keep them safe.
Layered clothes protects against getting hit, kicked and things being thrown at them, as sometimes street folks run into problems.
The seasoned cop and street savvy folks know to respect these folks and be careful.
Street person might have a screwdriver, revolver, carton cutter, and other tools concealed , or in hand in one of those pockets.
Good or bad street person, life on the streets, not Internet.