I'm starting a test project, and I could use input from those of you in counties other than Sacramento. What I need is for you to visit your county jail website, usually operated by the County Sheriff, and see if you can find a roster of recent arrestees. You can see how Sacramento's is here:
http://www.sacsheriff.com/inmate_information/
if you're able to locate such a site, take a look through the recent arrestees for any that have a federal hold on them such as ICE, Border Patrol, or US Attorney General. If your county jail does this, please post a link to the website in this thread.