That's an encouraging report, if true (would like to see the URL pointing to the citation).  

However, there are at least two caveats:  Will the "gun-using crime victims" be arrested, charged, tried and convicted for endangering the lives of others, as happened to Marissa Alexander in Florida 3 years ago? 

And will the "good guys with guns" suffer for the rest of their lives what Allen Crum had a mild form of - a PTSD-spawned change in personality, to the point where they perhaps even become a danger to themselves and/or others?

I often wonder, what if Mark Hughes had run armed with his AR-15 toward the gunfire in Dallas July 7th and had been the one who killed Micah Johnson, the shooter (instead of a robot bomb, later)? Would Hughes in turn have been killed by police, them thinking he was an accomplice?  https://www.washingtonpost.com/news/morning-mix/wp/2016/07/08/during-deadly-dallas-shooting-confusion-swirled-around-armed-man-carrying-a-rifle/