Story
September 21, 2026
Border Surveillance Expands Even as Deaths Slip Past Its Cameras
The investigation casts the border’s growing surveillance network as a system that promises awareness but repeatedly misses people in danger, while the reforms it proposes would force CBP to measure whether its technology actually prevents deaths.
For years, the U.S. has built a “virtual wall” of cameras, sensors and surveillance towers along the Mexican border, presenting technology as a way to detect crossings over vast and hostile terrain. But a year-long investigation by MIT Technology Review and Times of San Diego found people who passed through areas watched by advanced, AI-enabled towers and later died nearby, sometimes remaining undiscovered for weeks or months.1
The investigation’s chronology points to a long-running accountability gap. Border Patrol began installing the type of towers examined in the reporting by at least 2015, yet the agency has not publicly mapped the full network or audited whether it works against the most consequential measure: preventing deaths. Reporters examined nearly 600 towers, while the government says about 800 operate today, and counted more than 1,050 deaths near them — a figure they say is almost certainly incomplete.
The failures are not framed as a single technical malfunction. The reporting identifies broken towers, algorithms that did not detect people, and cases in which agents did not respond to alerts. In one small desert stretch near New Mexico state representative Sarah Silva’s district, more than 18 people died near surveillance towers in 2024 alone. Her reaction: “If I were the federal government, I would do an audit, because this feels like it’s not working.”1
The data systems behind the network have also lagged. A federal tracking system for migrant deaths existed from 2007, but national rules for entering cases arrived only in 2021. The Government Accountability Office later found many deaths — particularly those not discovered by Border Patrol — were still missing from the records. It also said CBP’s Missing Migrant Program had improved data collection but lacked a plan to determine whether it was increasing rescues or reducing deaths.
Now, as the U.S. prepares to spend $1 billion to triple the virtual wall by 2034, the investigation argues expansion should not outrun scrutiny. Its proposed remedy is blunt: audit deaths near towers, repair death records, track technology-assisted apprehensions, and automatically investigate whether surveillance saw — or failed to see — a person who died within its range.