MIT Technology Review Maps Nearly 4,000 Migrant Deaths Against Border Surveillance Towers

MIT Technology Review has published a methodology report for a 15-month investigation that mapped nearly 4,000 migrant deaths since 2015 against the locations and installation dates of US border-surveillance towers. The project asks whether deaths occurred near technology meant to enable faster responses to border crossings, while making clear that its map is bounded by incomplete public records and an incomplete tower inventory.

A long search for comparable records

The resulting analysis covers cases from 2015 onward. It compares death locations with tower locations and the dates towers were installed, rather than treating every death along the border as evidence about surveillance. The team excluded deaths inside Border Patrol stations, fatalities from vehicle pursuits, and cases without sufficiently precise location information.

Turning reports into map points

The usable Texas files amounted to more than 4,000 pages of police reports, some handwritten. For large batches from Kenedy, Webb, and Hidalgo Counties, journalists used Anthropic’s Claude through an API to extract the coordinates where remains were found. They then manually checked batches of the results for accuracy.

The map has blind spots on both sides

Tower coverage is incomplete, too. The Electronic Frontier Foundation had mapped about 600 towers by April 2026, while government records cited by the investigation indicated roughly 800 deployed towers. That gap means the analysis may miss deaths that occurred near towers not yet catalogued.

A baseline, not a final count

MIT Technology Review’s work does not turn fragmented records into a complete census. It does create a documented way to compare known deaths with a surveillance system built to detect crossings—and to show where the underlying public record remains too thin for firm conclusions.