Graduation Rates- I am in charge of graduation rates for a district and am not sure how a district could fake the stats. They start tracking this in 9th grade. If a student leaves your high school, and you can't provide proof that they enrolled in another school (in state or out of state) or left to homeschool, then that student counts against your stats if they do not graduate. It also counts against a school when students drop out and get a GED. In my state, I'm not sure how you could cheat the stats with computerized enrollment programs.
I also worked many years as a school counselor and can contest that many schools work very diligently to get help for troubled students. I have been involved with families that we took to court to have a judge force them to get their child mental health counseling or to continue medication for severe issues like schizophrenia or schizoaffective. I've called Child Protective services and LE and have worked hand-in-hand with both to get help for students. I had a Licensed Therapist on site who provided therapy students, but a parent had to give permission and be involved in the therapy. It is extremely frustrating if you don't have a parent who is willing to get help for their child. And you would be shocked at parents who do not cooperate. Some parents had their own mental health issues. Others didn't like the school's involvement and moved away...and I would pick up the phone and contact the next school to give them info. Sorry for the rant, but I promise some schools work very hard to get help for troubled students. And schools cannot tell other parents what all they have done to get help for a student.
It sounds like the shooter did have previous mental health services. But at 19, as an adult, he could make his own choices about getting help or taking meds.
I read the shooter was FAS (Fetal Alcohol Syndrome), but I wonder if he was RAD (Reactive Attachment Disorder) too.
http://www.dailymail.co.uk/health/article-5396665/Florida-shooter-19-fetal-alcohol-syndrome.html