How do you interpret trump's comment regarding the Florida shooter?

"[i]So many signs that the Florida shooter was mentally disturbed, even expelled from school for bad and erratic behavior. Neighbors and classmates knew he was a big problem. Must always report such instances to authorities, again and again[/i]!"

Is he blaming the classmates?

Is he closing the book on this issue?

Is he saying Americans should report other Americans when they see violent tendencies that might escalate? Like Rob Porter’s wives reporting him for being violent? Same?
If so, funny, trump and his administration ignored/disregarded their reports.