I just pasted the Tyler Robinson and roommate text messages into ChatGPT and asked whether they seem authentic.

[GopherGal]

20. My totally non-expert analysis

not even trained on all the IP I could steal off the internet, is pretty similar.

I agree with the AI that yes, it was "fabricated" but by whom and with what purpose?

The "my love" references seemed forced, perhaps in an attempt to shift blame onto the trans community.

The excessive detail reads like a confession, and what the motivation would be for a confession is something I imagine criminologists could say better than I.. My usual assumption is some sort of "claiming credit" for what they've done. But shielding loved one(s) from blame, as you suggest, is another.

So I can totally buy that Tyler actually wrote it, and if it seems stilted, it's because he knew it was likely to be found and examined by investigators. Fabricated for external consumption.