There is a glaring error in your story which needs to be corrected. The shooter definitely was not a trans woman. She was a cis woman at birth, who attended the school and may have had some mental health issues. She may or may not be transmasc. The only reliable information cited at this point is that she apparently used the pronouns he and him on a social media site. There is no indication at all whether she was trans or not other than this one little suggestive snippet, which may not be dispositive of the issue. She also apparently left a six page manifesto, the contents of which have not been revealed to the public yet. It is dangerous to make assumptions about the trans identity of this person which just further inflames the radical right. A little more circumspection would be appreciated. I really think you need to correct the way you have identified the shooter in this incident.