He may have stopped taking whatever medications he was on.
There were reports that the mother was planning to get him institutionalized.
Exactly, and precisely the condition that the columbine shooters were in.
They did not taper off those medications but cold turkeyed with horrible results.
If I remember correctly a year of tapering off these serotonin reuptake inhibitors is recommended...and much less often results in a psychotic break for the party thusly affected .
he was noncompliant with meds
may have been he was actually taking nothing
someone who does not want to take meds can trick you even if you stand there and watch them, which his Mom was probably not able to do