This is a good idea: a city law requiring local police encountering ICE operations to try to “verify the credentials of the on-scene federal lead-agent, supervisor, or agent in charge" and to capture their attempts to verify the agents’ identities on body-worn cameras.

SF ICE accountability law proposed after immigration arrest at SFO
https://www.sfchronicle.com/sf/article/sf-ice-accountability-law-proposed-sfo-arrest-22154389.php?utm_source=marketing&utm_medium=copy-url-link&utm_campaign=article-share&hash=aHR0cHM6Ly93d3cuc2ZjaHJvbmljbGUuY29tL3NmL2FydGljbGUvc2YtaWNlLWFjY291bnRhYmlsaXR5LWxhdy1wcm9wb3NlZC1zZm8tYXJyZXN0LTIyMTU0Mzg5LnBocA%3D%3D&time=MTc3NDcxMjEyNDQ1Ng%3D%3D&rid=M2VhYjVkNzItYjdhMi00NTMzLTkyYWItMmM5N2E3NTViYTk3&sharecount=MQ%3D%3D