A US surveillance program tracks nearly 200,000 immigrants. What happens to their data?

Guardian review of company's policies raises privacy concerns amid fears records could be shared or monetized

The Biden administration is proposing to expand a controversial surveillance program that tracks the whereabouts of more than 180,000 immigrants awaiting their day in court. But there is little transparency about what data is collected by the private company with an exclusive contract to run the program, or what may happen to that data in the future.

In a letter to the Department of Homeland Security (DHS), US lawmakers on 23 February raised fresh concerns about the Intensive Supervision Appearance Program, and the data collection practices of BI Inc, the private company running the effort for US Immigration and Custom Enforcement (Ice).