It took me a while to track down the actual opinion.

The case, United States v Spurlock, is 3:23-cr-00022 in the Nevada federal district. The opinion itself is ECF document #370, and I have hosted a copy at https://plover.com/~mjd/misc/cell-tower-dump-opinion.pdf in case other people are interested.

Thanks for finding this! Here's a link to Courtlistener/RECAP, which has a copy of this hosted for free as well.

Docket: https://www.courtlistener.com/docket/67397036/united-states-...

Order: https://storage.courtlistener.com/recap/gov.uscourts.nvd.162...

They've clearly read this to write this article. I don't understand why they don't at the very least reference it, even if they don't provide a direct link.