Ángel Díaz is a visiting assistant professor at the University of Southern California (USC) Gould School of Law. His scholarship and teaching focus on the intersection of emerging technology and racial discrimination. He has written on a range of topics, including police surveillance, the regulation of social media companies and the deployment of automated decision systems.

Díaz has authored or coauthored numerous reports and resources, including Double Standards in Social Media Content Moderation (2021), Law Enforcement Access to Smart Devices (2020), Automatic License Plate Readers: Legal Status and Policy Recommendations for Law Enforcement Use (2020), New York City Police Department Surveillance Technology (2019), among others. His work and commentary have been featured in outlets such as the Associated Press, NPR, the Washington Post, the Intercept, Bloomberg Law, Just Security, Brookings Tech Stream and Univision.

Prior to joining USC, he was a Lecturer in Law at UCLA School of Law. He was previously counsel in the Liberty & National Security Program at the Brennan Center for Justice and an adjunct professor of clinical law at NYU School of Law.

Díaz received his BA and JD from the University of California, Berkeley. During law school, he was book reviews and essays editor of the California Law Review, annual review editor of the Berkeley Technology Law Journal, and a legal research and writing teaching assistant. As an undergraduate, he taught a course on Cormac McCarthy, the Coen Brothers, and the Neo-Western.