in a statement, sheriff gregory ahern released a statement. i am confidence this single incident is isolated to this individual. >>> tough talk today from oakland mayor libby shaft who says she's willing to give up her own freedom in order to support sanctuary city policies. >> the fact that the federal government is suggesting that it is actively retaliating against jurisdictions that are exercising their rights to have sanctuary policies, that is what is illegal. >> so you're ready to go to jail over this? >> yes. >> her comments come today after isis planned immigration crackdowns across the bay area. it prevents local police from helping federal agents target undocumented immigrants. the sheriff of oakland is -- oakland mayor is not the only local official who is angry about what may be in the works here. >>. >> reporter: well, larry, san francisco supervisors are standing firm on their commitment to a sanctuary city, and immigration advocates we spoke with today say that report on ice raids is disturbing and that is it's creating fear amo