He specializes in police regulation, criminal law, criminal procedure, and privacy law. He holds a JD and PhD from the University of California, Berkeley. His research has appeared in top academic journals such as Cornell Law Review, California Law Review, and Minnesota Law Review. Numerous national media outlets have featured his research and expertise, including the Wall Street Journal, Washington Post, Chicago Tribune, Los Angeles Times, Philadelphia Inquirer, National Public Radio, PBS Frontline, Time Magazine, Al Jazeera America, and BBC America.