Author: Jerry H. Ratcliffe

Dr Jerry Ratcliffe is Professor of Criminal Justice and Director of the Center for Security and Crime Science at Temple University, Philadelphia. He served for over a decade as a police officer with London’s Metropolitan Police (UK), has a Ph.D. from the University of Nottingham, and is a Fellow of the Royal Geographical Society. He was the lead researcher on the Philadelphia Foot Patrol Experiment and has published over 70 research articles and four books in the areas of intelligence-led policing, spatial analysis, criminal intelligence, and crime science. He is a research advisor to both the Philadelphia Police Commissioner and to the Criminal Investigative Division of the FBI. He is currently leading an experiment examining predictive policing strategies. Dr Evan Sorg is an Assistant Professor of Law and Justice Studies at Rowan University, an affiliated instructor and researcher in the Center for Security and Crime Science at Temple University and a former New York City police officer.  He served as a research assistant on the Philadelphia Foot Patrol Experiment during his Ph D work at Temple.  He has published several research articles on the topics of hot spots policing and crime analysis, three of which involve the topic of foot patrol, and stemmed from the Philadelphia Foot Patrol Experiment.  He has taught numerous cohorts of police officers and crime analysts on the topic of crime mapping and crime analysis, and he teaches Central American police commanders on the topic of intelligence-led policing.