http://www.irli.org/links.html
The Quintessential Force Multiplier: The Inherent Authority of Local Police to Make Immigration Arrests, Kris W. Kobach, Albany Law Review, 56 pages (2005).
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Page 199 of this PDF (page 21 of the PDF) has a discussion of local law enforcement’s authority to make arrests for violation of federal immigration laws.
Also see the law review article listed just above the one mentioned here.
Thanks for the links. Very useful information.