Andrew Guthrie Ferguson

Andrew Guthrie Ferguson is a Professor of Law at George Washington University and one of the leading US scholars of how digital surveillance collides with constitutional criminal procedure. He is the author of Your Data Will Be Used Against You, a study of what he calls ‘self-surveillance’ — the way the smart devices we buy for convenience generate a record that police and prosecutors can turn against us.

Ferguson has taught criminal procedure and the Fourth Amendment for some sixteen years, and his central preoccupation is the widening gap between the pace of technological change and the pace of legal change. The controlling privacy precedents, he notes, still turn on payphones and bank microfiche, while cheap cameras, automated licence-plate readers, facial recognition and now AI have transformed the scale of data available to the state. His scholarship — including law-review work on ‘real-time crime centres’ and on predictive policing — maps this disconnect and proposes ways to close it.

Core positions

Ferguson argues that we have voluntarily built a self-surveillance infrastructure — every smart device is a surveillance device, and we pay to install it — without building the legal protections we assume already exist. He contends that a judicial warrant is a weak safeguard: it requires only probable cause plus a modest criminal predicate, so there is effectively no category of data, however intimate, that police cannot reach. The deeper shift, in his account, is that the default has reversed from collect-when-needed to collect-everything-first, which makes targeting anyone trivial and puts everyone — protesters, gun owners, senators, even a former president — within the aperture of surveillance.

His remedy is deliberately narrow. Rather than wait for comprehensive data-privacy legislation, which he doubts Congress will pass, he would raise the standard police must meet to use self-generated data — modelling it on the wiretap regime that has governed hidden microphones since the late 1960s, where officers can still obtain the material but only by convincing a judge to a higher bar and minimising unrelated content. He treats facial recognition as the algorithmic cousin of unreliable eyewitness testimony, and warns that AI is the true game-changer because it makes an otherwise unsearchable ocean of surveillance data usable — the concern behind Anthropic’s refusal to supply its models for mass surveillance.

In the wiki

• Andrew Guthrie Ferguson on Surveillance, Data, and the Erosion of Privacy — Sean Carroll’s Mindscape #347 (16 March 2026): self-surveillance and data brokers, the Fourth Amendment and the reasonable expectation of privacy, the third-party doctrine, facial recognition and predictive policing, and a wiretap-style standard for the AI age