I'm going out on a limb here, and many of you may not agree.
I wonder if Tyler's CHP permit actually caused him and the other guy to lose their lives? Tyler pulled his gun and the punk fired first. Moving on, the punk had nothing to lose because he had already shot one person, he shot the second person at the end of the second robbery.
We're having a lot of robberies by gun in Charlottesville. So far nobody has been shot because they aren't armed and don't fight back.
It really depends on the situation I think, at least for me. If somebody runs into the bank and I'm there carrying concealed, my first thought will be to be a good witness. I'm not just going to open fire and risk a two sided gun battle or hitting somebody else in the bank because chances are they aren't going to want to hurt anybody, but if they do something to make me think that they where going to start attacking/shooting I would feel no choice but to defend myself. I can't say exactly what would make me feel that I needed to defend myself in a situation like that, and hopefully I won't ever have to find out.
Also, according to the news report Tyler did not draw his gun, it was taken from his holster during a struggle so it could have been that they where struggling and that is when the murderer realized he had a gun and took it while attempting to rob him. Not knowing exactly what happened makes it impossible to know all we can do is wonder.