Worrying about the persons

The Mounties held a press conference the other day about the school shooting in British Columbia. NBC was there -- by phone or video, I think. Anyhow, the NBC newsperson was alert to the fact that the shooter is said to be "transgender," in this case a guy who identifies as female. “Do authorities believe the first two victims found were killed by the same gunperson?” the NBC newsperson asked. “Do you know the gunperson’s relationship to the school at all?”