"FILE - In this May 13, 2016 file photo, Oakland Mayor Libby Schaaf, speaks at a news conference in Oakland, Calif. A federal immigration official says about 800 people living in Northern California were able to avoid arrest because of a warning by Schaaf. Thomas Homan, the Immigration and Customs Enforcement chief, told ""Fox and Friends"" Wednesday, Feb. 28, 2018, that what Schaaf did was ""no better than a gang lookout yelling 'police' when a police cruiser comes in the neighborhood."" (AP Photo/Ben Margot, FIle) Photo: Ben Margot, Associated Press"