We don't know what triggered an alert, but we might deduce what didn't. If NG was not attending church in person, as DM claims and BE is also now claiming, and the online stream does not show who is viewing, the story of the concerned parishoner falls flat. IIRC, the story about the alert came from AG. Why would she lie?Given that we don't know what triggered the alert -- and that there are other ways it could've happened -- it's not clear to me how that would necessarily implicate them.
JMO