“Unlike other groups, however, no precise national figures exist on the number of homeless undocumented migrants. For one, they are less to likely to identify themselves as undocumented for fear of deportation. Homeless Hispanics are also more likely to spend the night in atypical unsheltered locations like abandoned buildings, according to the Institute for Children, Poverty and Homelessness, making them more likely to be overlooked. Moreover, undocumented homeless immigrants are a daunting population for nongovernmental service providers to help, since federal funding rules and other laws create barriers that make every case a jigsaw puzzle.”