Couldn't see a thread on this, apologies if I've missed one.
I remember this case from previously, and now it's in the news again due to sentencing today.
The "trans" part is of course pretty well hidden in the BBC article https://www.bbc.co.uk/news/articles/clyj2g5l1g2o (in a part that says, "Ahead of sentencing, Winter's lawyer said that the teenager was vulnerable and a transgender person and that would need to be taken into account."
). Male pronouns throughout. The Scottish Daily Express is much clearer, saying above the article "Felix Winter, who was born female but identifies as a male..." https://www.scottishdailyexpress.co.uk/news/scottish-news/trans-teen-obsessed-columbine-massacre-35646796 Pronouns mostly avoided, but a couple of "he"s appear in a quote.
It's pretty rare, obviously, for school attacks to happen or be planned, and even rarer in the UK. It's also rare for females to be the perpetrators. So we have an intersection of rare events...
Is the trans identity random and irrelevant? Is it down to hormones? (This person is only 18, so perhaps we can say not). Is it down to wanting to prove a masculine identity? This article suggests it could play a part "So why are female school shooters rare? Jillian Peterson, co-founder of the aforementioned Violence Prevention Project who is also a forensic psychologist and professor of criminology, says many school shooters “see themselves” in the perpetrators behind other mass shootings, which have historically been men." https://www.campussafetymagazine.com/insights/how-common-are-female-school-shooters/165257/