One report on the radio today indicated that the shooter was "trans". The show's host also pointed out how many of these shootings have been done by trans and hinted that it was time to start considering that
Yes, we've been discussing that previously in this thread.
..."being trans" may be a sign of a mental imbalance.
It's certainly more than that. It's beyond strange that wanting to mutilate or excise healthy parts of the body, in favor of kludged, make-shift imitations of opposite-sex body parts is not seen as an obvious form of self-harm.