You seem to know everything so give us YOUR official report.
I am so fucking tired of "journalists" giving reports on every fucking thing while nothing official has been said. You can play along with the bullshit and read the nonsense. Anyone with common sense would not be bothered.
Anyone with common sense would look at the reported facts on the shooter, and look at someone who could cold bloodedly kill 20 young kids like killing ants with a can of Raid, and come to the conclusion that something was seriously wrong with him, and that the mother was either in severe denial and/or had shit for brains or was mentally not right herself (among other things, she shared something with her son, she seemed to be extremely anti social, didn't socialize, and seemed to be rooted to her house)