On April 1st there is a “Trans day of Vengeance” fundraising rally for this sort of training.
The group that's organizing it is TRAN. The last time they organized an event (Transgender day of Remembrance) was in Colorado at the Club Q nightclub. There was a shooting there at few days before their event.
And now TRAN is scheduling an event (transgender day of Vengeance) at schools and there's a shooting at a school.
Perhaps just coincidental.