To amend the Immigration and Nationality Act to reauthorize the State Criminal Alien Assistance Program.

H.R. 820 seeks to extend and modify the State Criminal Alien Assistance Program (SCAAP), a federal initiative that reimburses state and local governments for the costs of incarcerating undocumented immigrants who have committed crimes. The bill would authorize funding for the program through fiscal year 2010 and change how those funds are distributed by prioritizing payments to states located along the U.S. borders with Mexico and Canada, as well as states with the largest populations of unauthorized immigrants. For citizens, this legislation aims to reduce the local tax burden in heavily impacted areas by shifting more of the financial responsibility for these correctional costs from local and state budgets to the federal government.