https://www.techdirt.com/articles/20190110/10014041371/sixth-circuit-appeals-court-latest-to-say-cool-if-fbi-broke-law-during-playpen-investigation.shtml

The seventh Appeals Court to weigh in [PDF] on the FBI's Network Investigative Technique deployed in the Playpen child porn investigation has weighed in. Unfortunately, it makes the Sixth Circuit the seventh appeals court to find the FBI's warrant problematic, but willing to apply the "good faith" band-aid.

The problem with the application of the "good faith exception" is it assumes good faith on behalf of the FBI. There's no reason to believe the FBI acted in good faith, though. While it was in the process of obtaining a single warrant allowing it to search computers all over the world, it was well aware Rule 41 limited searches to the jurisdiction where the warrant was obtained. It knew this because the DOJ was in the process of asking the Supreme Court and Congress to change Rule 41 to remove the jurisdiction limits while it was pursuing this investigation.