Chuck, thanks for sharing the two active shooter situations that you have experienced. That kind of information helps us civvies get an accurate glimpse into scenarios that we are highly unlikely to ever have to face ourselves.
In the article, several times you mention armed civilians along with the first responding PO as people who might engage an active shooter. I would be interested in hearing your thoughts on what the POs you know would think of an armed civilian engaging as opposed to simply leaving the scene if they had the opportunity to do so. I believe this is something all armed civilians ponder - do you simply "get out of Dodge" if the opportunity to safely do so presents itself, or in the absence of any LE who have not yet arrived engage the shooter?
I know there are many moral/legal facets to such a decision, including the ramifications of hitting an innocent while attempting to stop a slaughter. While POs are expected to engage in order to uphold their oath to protect, I can easily envision some consternation in the minds of LE (and certainly the DA) to a civilian who engaged when they were not directly under fire and/or had the opportunity to flee to safety (regardless of the outcome of such engagement).
My sincere thanks for your time and consideration on this not-so-easy-to-answer question.