Henry Lim Cho holds an M.A. in human services with an emphasis in criminal justice leadership from Concordia University, St. Paul, Minnesota. He has worked in the field of criminal justice for more than 10 years and has held positions as a community service officer, police officer and detective. He has also worked in private security. He retired from the Rosemount (Minnesota) Police Department with the rank of sergeant. Sergeant Cho has experience as a use-of-force instructor and as a crime scene investigator. His professional memberships include the Text and Academic Authors Association, Minnesota Police and Peace Officers Association, International Association of Identification--Minnesota Chapter, Minnesota Sex Crimes Investigator Association, High Technology Crime Investigation Association, National White-Collar Crime Center and the Fraternal Order of Police. Sergeant Cho co-authored POLICE OPERATIONS and INTRODUCTION TO LAW ENFORCEMENT AND CRIMINAL JUSTICE, and he has been published in the Minnesota Police Journal. The late K�ren Matison Hess, Ph.D., wrote extensively about law enforcement and criminal justice, gaining a prestigious reputation for the consistent pedagogical style around which she structured each textbook. Dr. Matison co-authored multiple editions of MANAGEMENT AND SUPERVISION IN LAW ENFORCEMENT, JUVENILE JUSTICE, INTRODUCTION TO LAW ENFORCEMENT AND CRIMINAL JUSTICE and CONSTITUTIONAL LAW AND THE CRIMINAL JUSTICE SYSTEM in addition to CRIMINAL INVESTIGATION. Many of the renowned strengths of Dr. Matison's practical presentation as well as her investigative insights remain hallmarks of this new edition. Christine Hess Orthmann holds an M.S. in criminal justice from the University of Cincinnati and has been writing about and researching various aspects of criminal justice for more than 20 years. A well-respected author of numerous Cengage Learning textbooks, Ms. Orthmann is a former reserve officer with the Rosemount (Minnesota) Police Department. She is a member of the Academy of Criminal Justice Sciences, the American Society of Criminology, the Text and Academic Authors Association and the National Criminal Justice Honor Society (Alpha Phi Sigma).