Karen is Professor of Sociology and Director of the Centre for Criminology at the University of Hong Kong. Her recent research focuses on drugs, stalking and violence, social harms and service access for ethnic minority youth, and investment fraud. As a native San Franciscan, she has been involved in criminological research since the 1980s, working with non-profit organizations and government agencies in Northern California. She moved to Hong Kong in the 1990s, and has witnessed the development of the city’s drug market over the past two decades. She is currently completing a 20 year follow-up study on Hong Kong’s drug market. She also works with a number of local, regional and global partners to research and provide training on harm reduction and drug policy.