Thanks for clarifying that. I couldn’t think of the event or where it was to google it myself.

Although I did find this:

“The robbers wore homemade body armor which successfully protected them from handgun rounds and shotgun pellets fired by the responding officers. A law enforcement SWAT team eventually arrived with better weapons, but they had little effect on the heavy body armor used by the two perpetrators. The SWAT team also commandeered an armored car to evacuate the wounded. Several officers additionally equipped themselves with AR-15s and other semi-automatic rifles from a nearby firearms dealer.”

I believe firing handguns at body armor was an inadequacy hence why they needed to go get AR15s. They had fully automatic weapons to the officers handguns. I think my point stands.