Meet the Team

TAG consultants come from diverse backgrounds.

Our core team is unique in that each has experience working within police departments, serving as consultants to community and criminal justice agencies, and working within the academic research community.


Julie Wartell


Julie Wartell is an independent advisor on public safety issues relating to crime analysis, problem solving and justice systems.
She has previously served as crime analyst coordinator for the San Diego District Attorney’s Office; project director of the East Valley COMPASS Initiative (a regional analysis effort); crime analyst for the San Diego Police Department, researcher for the Institute for Law and Justice and the Police Executive Research Forum, and fellow at the National Institute of Justice Crime Mapping Research Center.
Wartell has performed a wide range of research on and analysis of various crime problems and police-related issues, worked on strategic planning efforts, and coordinated the development of a series of crime mapping training modules. She has conducted extensive training and made presentations to officers and analysts around the world on topics relating to crime analysis and problem-oriented policing, and has edited or authored numerous publications.
Wartell currently teaches GIS in Urban Studies at the University of California–San Diego. She has a master’s degree from San Diego State University in public administration with an emphasis in criminal justice administration and a Postgraduate Diploma in Applied Criminology and Police Management from University of Cambridge.

Katie Gallagher


Katie Gallagher is an independent consultant providing technical and research assistance to police, community, and government agencies focused on alleviating stubborn crime problems.Gallagher has provided both technical crime analysis assistance as well as research guidance to local police departments and community agencies.
Gallagher received her PhD in Criminal Justice from the University of Cincinnati and her Masters in Justice, Law, and Society from American University.  She has published in Policing: An International Journal of Strategies & Management, Policing: A Journal of Policy and Practice, and Criminology, Criminal Justice, Law & Society.  Prior to earning her doctorate, she previously served as a crime analyst for the Alexandria, VA, Police Department, a program manager for NCPC'S CPCA, and a program coordinator at the Ohio Innocence Project.
In addition to her research and consulting activities, Gallagher is currently an adjunct professor with Michigan State University.

Greg Stewart


Greg Stewart is a sergeant and 19-year veteran of the Portland Police Bureau in Oregon. He currently runs the Bureau’s Crime Analysis Unit. Sergeant Stewart has served as a patrol officer, including working in both a walking beat and conducting street level drug investigations, and as a patrol sergeant.
Sergeant Stewart has an undergraduate degree in Psychology from Lewis and Clark College and a master’s degree in science from Portland State University’s Criminology and Criminal Justice Program.  Sergeant Stewart has presented at a number of academic and professional police conferences such as the International Association of Chiefs of Police, the International Association of Crime Analysts and the American Society of Criminology.  He has also trained or consulted for police agencies from the United States, Canada, Bangladesh, Mexico and the Ukraine.

Next Steps...

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