There are several organizations in NYC who have formed a campaign to stop ICE from investigating, and arresting Criminal Aliens on Rikers Island, NYC's jail, and the largest jail in the nation. Here are the links:

http://www.maketheroad.org/report.php?ID=989

http://www.newsanctuarynyc.org/ourcampaigns.php

http://feetin2worlds.wordpress.com/2009 ... cal-jails/

http://www.onnyturf.com/blogs/view_post ... t_id=37699

http://brennan.3cdn.net/a3b41ee5c07754e ... 6ivdbz.pdf