Does anyone have, or can point to, any data or any circumstances where an employee has successfully sued an employer because they were not allowed to arm themselves and they were injured or killed?

This opposed to any successful lawsuits against employers who have been sued because they allowed employees to arm themselves and someone was injured and killed because of that.

I'd like to try and change my employers attitude about allowing those of us who wish to carry while at work. Currently, of course, "for our safety" we are disarmed. Many say that it's because of liability reasons. Any stats to back that up? any stats to refute that?

Thanks for the help!