"Most of those arrested in Portland have been held for court. In at least one instance, however, an arrestee was searched, placed in a holding cell, read Miranda warnings, and then released when he refused to answer questions. So why do this? Simple. It’s a very effective means of gathering intelligence. Stripped of their goggles, helmets, and masks, arrestees can be photographed, and their identifiers, such as fingerprints, body markings, etc., can be recorded. What information these idiots haven’t given away for free by way of Facebook and other social media, a quick check of their cell phones and search of their pocket litter can provide."
https://spectator.org/come-retribution-the-federal-system-restores-rule-of-law/