They are demonstrating against a new law that goes into effect today. Under the so-called S-Comm program -- anyone arrested for a misdemeanor would have their fingerprint information automatically sent to the U.S. Immigration and Customs Enforcement, better known as ICE.
San Francisco Sheriff Mike Hennessey has been trying to opt out of the law, which he says is in conflict with the SF's' sanctuary policy.
State Attorney General Jerry Brown has said it's impossible for San Francisco to opt-out.
