Do you have a source to your Bryan claim?
If you look at the map, there are zero flock cameras reported in that region.
None in Moscow Idaho where the murder happened, none in Pullman where he lived, and none showed between the locations.
You can't rely on Flock's "transparency" reports either, they're woefully inadequate. In our County, the Sheriff spoke of a PD in the County getting a Flock hit. It was news to many, including Flock's transparency site, that that PD was a user of their services.
So I'm not overly surprised by this.
There's a disclaimer when you first open the page that the map is incomplete and that users need to submit the data. It's possible that data hasn't been submitted/parsed yet