Ralph and Shirley Shapiro Professor in the UCLA School of Law. She has been the dean of the School since 2015. She is a member of the American Academy of Arts and Sciences and served on the National Academy of Sciences' Committee on Science, Technology and Law, where she co-chaired the President's Council of Advisors on Science and Technology (well known for its report on the use of forensic science in the American criminal courts). She is the co-author of “The New Wigmore. A Treatise on Evidence” and from “Modern Scientific Evidence: The Law and Science of Expert Testimony”. She has published extensively on topics related to forensic science, including latent fingerprint identification, handwriting expertise and DNA evidence, among many others.