I'm amazed at the boldness of the trans woman in openly appealing for details of the venue, which information was then clearly used by that person or her associates, to make illegal threats. She obviously felt "untouchable" because she is on a rainbow police committee and therefore seen as a "good person" by the police.
I wish I had had the courage to report those messages. But I doubt the police would have taken them of evidence.
Did you screenshot them? Useful for archiving for a number of reasons.