That has been a common trope in gangster movies for ages. A violin case can easially hide a gun (depending on the gun of course, but you get to select this). You can find craftsmen in your gang who can make a violin case that also has a gun so it can even be opened an inspected by someone who doesn't know how to find the secret gun compartment, and it isn't hard to teach someone to play some simple songs on a violin thus giving a reason to carry a violin (you don't need to be good, just be able to show you have another lesson next week). I don't know if this works as well in the real world as movies, but it is plausible.

Law Enforcement Officers, ie the Police.

Law enforcement officer, or police.

What cops want to be called instead of "cops", "the filth", or "pigs".

Cops killed a lot of people with negligible effect on crime. You're making an assertion that needs some support in light of the track record of US policing.

The obvious outcome of increased security and scanning to get into schools is what happened at Annunciation where the shooter just shot from outside the security area since all of those people still gather and walk past unsecured areas.

https://en.wikipedia.org/wiki/Annunciation_Catholic_Church_s...

I thought it was legal in America to bear arms? Is the constitution magically suspended in schools?

"Some of you may die, but that's a risk I'm willing to take!"