Often and always aren’t the same.
Meh. If something like this can happen with a police officer in a school, what are the odds that teachers with guns won’t lead to similar incidents multiplied?
http://minnesota.cbslocal.com/2018/02/06/3rd-grader-fires-gun-maplewood/
I know they aren't the same but where does the data come from?
Court records I would presume. Or maybe news stories like this one:
http://blog.al.com/spotnews/2009/12/pharmacist_charged_in_officers.html