I mentioned that I think the protocol for law enforcement should be to shoot first

[randr]

a friend of mine was appalled.
Then I mentioned that is already the protocol if you are black or brown, even if the weapon is only suspected.

[TreasonousBastard]

1. I wasn't that guy, but I'm even more appaled now.

[Voltaire2]

2. Well it ought to be shoot as a last resort.

But I think you know that. Fair enough on your follow up that this obviously is the policy for people who aren’t clearly white.

[keithbvadu2]

3. When police enter the building, how do they know the armed teacher is not the mass shooter?

When police enter the building, how do they know the armed teacher is not the mass shooter?

The mass shooter could say he is a teacher.

[Igel]

5. Shooters usually look like a student.

Which is why my school is very clear: We're to tell students to do what the police effing tell them. "Drop!" means flop on the ground. "Stop" means "stop." Don't protest, don't run to hug the cops, don't do anything but go limp and eat dirt. Use your brain, not your emotions.

Why?

Easiest way for a shooter to leave the building is to hide the gun, run screaming from the building with the other students, and then start killing all over again. Or just keep on runnin'.

A student runs at a cop? The poor human in the uniform might panic and shoot the student. Sure, bad cop. But after all the reprimands and punishment, the student's still been shot.

[Mr.Bill]

6. Or the cops show up at a grocery store robbery

and find 25 people with weapons drawn shooting at each other. It's just a matter of time with permitless open carry.

[former9thward]

7. How come it has not happened?

The green states (dark and light) are states with permitless carry. I have not heard of any shooting where the cops arrive and they find the situation you describe.

[Mr.Bill]

8. Most of these laws have been passed relatively recently.

It's just a matter of time.

[former9thward]

9. I guess if you measure time in decades.

But no, they have been around for a long time in a great many of the states. I suppose any scenario imaginable can happen in a matter of time...

[kimbutgar]

4. I watched a show on ID where a white guy was talked down and eventually apprehended

But if it was a black man he would have been shot.