William D. Lopez's work and advocacy focus on the health impacts of law enforcement, including surveillance, arrest, incarceration, and deportation, in communities of color. He is the author of the book, Separated: Family and Community in the Aftermath of an Immigration Raid. Dr. Lopez also teaches a variety of public health classes, including the Social Determinants of Health, Health Program Planning, and Health Communication, both residentially and online. Dr. Lopez has been fortunate to collaborate both in his research and advocacy with the Washtenaw Interfaith Coalition for Immigrant Rights and Synod Community Services, which operate the Washtenaw County ID Program.