Can you posit any reason that would justify, explain, excuse, mitigate, or even mildly offset the actions of this dangerous psychopath who was given, by the power and force of government imprimatuer, in loco parentis control of some two dozen small children?
Not at all. Simply commenting on an obvious gap of info in the story and wondering why it either wasn't included, wasn't asked or was perhaps, edited out.
I was wondering the same thing. Even a later update didn't answer this question. Very odd.