OK, per the morning fish wrap and AP (who's veracity ain't what it used to be, and appears to have an agenda, which they didn't used to) the late shooter was a state licensed armed security guard.

Allegedly the local prosecutor's office is still investigating the incident. There was uncertainty if either/both of the armed citizens were licensed to carry and mention that "state law allows a person to carry a firearm in their vehicle in certain circumstances."

"The investigation is continuing" is doubtless true-for a whole bunch of reasons having nothing to do with the apparently lawful use of force. I expect part of that is exactly how the alleged attempted murderer became a state licensed armed security guard (lotta butts to cover if nothing else). The question is if they're just covering all bases on all participants (including if either is a felon or otherwise barred from lawful firearm possession), or actively looking for a hook to hang charges. The comment about state law is likely to deflect those with an agenda.