IMMIGRATION DETENTION

In fiscal year 2017, ICE operated on a budget of nearly $3 billion to manage the U.S. immigration detention system, which houses foreign nationals whose immigration cases are pending or who have been ordered removed from the country. In recent years, ICE has consistently had to reprogram and transfer millions of dollars into, out of, and within its account used to fund its detention system. The explanatory statement accompanying the DHS Appropriations Act, 2017, includes a provision for GAO to review ICE’s methodologies for determining detention resource requirements. This report examines (1) how ICE formulates its budget request for detention resources, (2) how ICE develops bed rates and determines ADP for use in its budget process, and (3) to what extent ICE’s methods for estimating detention costs follow best practices. GAO analyzed ICE’s budget documents, including CBJs, for fiscal years 2014 to 2018, examined ICE’s models for projecting ADP and bed rates, and evaluated ICE’s cost estimating process against best practices...