In civil engineering, forensic engineering examines the causes of bridge and levee failures, building collapses, and other major civil engineering disasters, as cited in many ASCE Forensic Engineering publications and conference topics. In this special Expert Witness session, Dr. Tonja Koob Marking will provide an overview of the expert witness role in litigation and present several litigation case studies. Dr. Koob Marking will provide her insights in how water resource engineers contribute to forensic engineering and how water resources engineering forensic studies come up as expert witness opportunities.