I would like to know if the Navy Yard shooter was ever on ADD or ADHD meds. I would also like to know that about the Sandy Hook shooter, the Colorado shooter and other younger multi victim shooters. Of course I'm sure that would be confidential information but I do know that if one is on "anti depressants" or other emotional altering drugs one has to weaned off these substances. Once the child comes off the parent's insurance and maybe can no longer afford the drugs they go on these rampages? I don't know but I think it would be worth looking into.
Don't know if it's been addressed on the show or not... but the mental health questions were taken off the security clearance questionnaire several years ago due to "stigma".