I really do think that mental health is the biggest issue at large here. In most mass shootings that have occurred over the last two decades here in the USA, it has been due to some sort of psychological issue. It is very, very rare to have a shooting like this 'just for lulz' - and even there psychological issues could be cited.
So, I feel that right-to-carry permits should come with questions like "Who has access to your home," and "Is there a history of mental instability in your family?"
So, I feel that right-to-carry permits should come with questions like "Who has access to your home," and "Is there a history of mental instability in your family?"