I don't know enough of the story to say... I have serious issues with so many carrying firearms, licensed or not, to say what I think without knowing the specifics.
@FreeSpirit1 Thanks, after reading the article I have to say his actions in this instance were heroic. He could have walked away but choose to stop the killer.
There still remains for me concerns (based upon my life experiences) about the general public going about armed. However in this instance, his actions were heroic, justified and without collateral damage.