The Waukesha County sheriff defends an effort to have his deputies help enforce federal immigration laws. Eric Severson was called on the carpet by the American Civil Liberties Union, which publicized his application from May to become a partner with the federal Office of Immigration and Custom Enforcement — better known as “ICE.” Severson says the feds have not acted on his application yet, and he insists it would only involve what he called “jail custody of illegal aliens.” The A-C-L-U says it would erode trust between Waukesha County immigrants and their law enforcement, discouraging them to report crimes and cooperate as witnesses. The sheriff says his department would not become a “local immigration force” and it would conduct sweeps that look for non criminal illegal immigrants.