In early 2015, a group of friends who all worked in policing began talking to each other about our experiences. It turned out that we had more than friendship in common… we shared a common concern about the state of policing in America.

We had all come to a point in our careers where we realized there was very little scientific evidence to support what we were doing. We worked in different size departments, in different areas of the Country and within different policing assignments but found that our different work environments and experiences just confirmed our suspicions. We all believed there had to be a better way of policing… evidence-based policing seems to be the answer.

Founding Members

All good ideas start with good people. In our case, the American Society of Evidence-Based Policing was started by a small group of like-minded policing folks. We are all active in law enforcement as Police Officers, Sergeants, Lieutenants or Crime Analysts but collectively, we felt it was time for a change. Our bios are below but you’ll probably find that we’re just like you. We want to make a difference in our profession and encourage you to join us.

Executive Committee

Renee Mitchell (

Renée J. Mitchell has served in the Sacramento Police Department for twenty- one years and is currently a Police Sergeant. She holds a B.S. in Psychology, a M.A. in Counseling Psychology, a M.B.A., a J.D., and a Ph.D. in Criminology from the University of Cambridge. She was a 2009/2010 Fulbright Police Research Fellow where completed research in the area of juvenile gang violence at the London Metropolitan Police Service. You can view her TEDx talks, “Research not protests” and “Policing Needs to Change: Trust me I’m a Cop”, where she advocates for evidence-based policing. She is the founder of the American Society of Evidence-Based Policing, a National Police Foundation Fellow, a BetaGov Fellow, a member of the George Mason Evidence-Based Policing Hall of Fame, and a visiting scholar at the University of Cambridge. Her research areas include policing, evidence-based crime prevention, evaluation research and methods, place-based criminology, police/citizen communication and procedural justice. She has published her work in the Journal of Experimental Criminology, Justice Quarterly, and the Cambridge Journal of Evidence-Based Policing. She has an edited book with Dr. Laura Huey, Evidence Based Policing: An introduction.

Rachel Tolber (

Rachel Tolber has worked for the Redlands Police Department (CA) since 1998. She is currently a Lieutenant responsible for Patrol, Community Policing, Traffic, and Special Events. During her tenure with RPD, she was instrumental in creating the Police and Corrections Team (PACT), and spearheaded the Citizen Volunteer Park Rangers for the City of Redlands. Rachel has served in a variety of positions, including: Field Training Officer, Patrol Officer and Supervisor, Detective, Professional Standards and Training, and as an Executive Intern to the Redlands City Manager, where she helped lead policy and strategic initiatives adopted and implemented by city executives.

Rachel’s law enforcement background includes extensive collaboration and work with numerous local, state and international law enforcement agencies. Her research interests include re-entry, restorative justice, and technology. She received her Bachelor degree from the University of Redlands, California, in 1998. She received a Masters in Criminology, Law and Society from the University of California, Irvine in 2006. In 2011, she received a Masters in Applied Criminology and Police Management from the University of Cambridge, United Kingdom. Rachel is currently a National Institute of Justice LEADS Scholar and serves as the Treasurer for the American Society of Evidence Based Policing.

Stuart Greer (

Stuart Greer has been a police officer in Morristown, New Jersey since 1998 and currently serves at the rank of Lieutenant.  As the Executive Officer of the Support Services Division, he is responsible for overseeing Criminal Investigations, Public Information, Police Records, Property & Evidence, and Internal Affairs.

Lt. Greer is a Policing Fellow at the Police Foundation in Washington, D.C. and has traveled extensively across the United States as an instructor for the Virginia Center of Policing Innovation teaching Police Commanders evidence-based approaches to reducing homicide and gun violence.  He has served as a subject matter expert and consultant for various initiatives, most recently working on a cost-benefit analysis project for developing police technologies and strategies. Finally, Lt. Greer is a founder and board member of the American Society of Evidence-Based Policing committed to ensuring that policing moves forward as a profession.

Lt. Greer received a Master of Studies in Applied Criminology & Police Management from the University of Cambridge in the United Kingdom and an Executive Master of Public Administration from the Robert F. Wagner Graduate School of Public Service at New York University.  His research examined utilizing evidence-based checklists to improve burglary investigation outcomes and overall case screening decisions.

Obed Magny (

Dr. Obed Magny grew up in Boston, MA where he earned his BA in Criminal Justice and Sociology at the University of Massachusetts. Magny relocated to Sacramento where he obtained a Master of Science in Emergency Services Administration from California State University at Long Beach, and a Doctorate of Education in Organizational Leadership from the University of La Verne.

Magny is currently a Police Officer at the Sacramento Police Department engaged across various lines of the Department; such as Narcotics, School Resources, Crime Suppression and Parole Intervention. Magny also served on the Board of Directors for the Sacramento Police Officer’s Association for three years.

In addition, Magny is a Level I and Level II instructor for TalentSmart, which is the world’s largest provider of Emotional Intelligence training.

Jason Potts (

Jason Potts is a Lieutenant with the Vallejo Police Department where he has served for 17 years. He is also a National Institute of Justice (NIJ) LEADS Scholar and a Police Foundation Fellow. Jason’s research interests include body cameras and their affect on policing strategies, license plate readers, police data limitations, and cognitive interviewing techniques. Along with his duties as a Lieutenant in the Patrol Division, he is also a Reserve Special Agent with the Coast Guard Investigative Service where he frequently travels to Fort Leonard Wood Missouri to help instruct trauma-informed interviewing techniques to Army CID Special Agents.

Jason has a background in major case, narcotics and gang investigations and has served on the Vallejo Police Department SWAT Team. He recently completed a practitioner-led randomized controlled trial in partnership with BetaGov where they sought to test the effectiveness of license plate readers and has presented his findings all over the country. He is presently leading an additional theft deterrence trial with BetaGov to test the effectiveness of additional focused patrol, crime prevention flyers, ghost cars and GPS bait to combat auto burglaries during the holiday season. Jason possesses a Master of Advanced Studies (MAS) in Criminology, Law, and Society from U.C.Irvine.

Chris Vallejo (

Commander Chris G. Vallejo is a 26-year veteran of the Austin Police Department and oversees the Northwest Area Patrol Command.  He is excited about implementing evidence-based practices to address crime, measure community sentiment, and organizational effectiveness. Chris serves as an Executive Committee member of the American Society of Evidence-Based Policing, a National Police Foundation Policing Executive Fellow, a Police Advisor to Measure, an Austin-based community research and advocacy group, and is an NIJ LEADS Scholar.  Chris is an avid student of leadership, evidence-based policing, performance-management systems, police officer health and well-being, and 21st-century policing principles. Chris holds a Bachelor of Applied Arts and Science from Midwestern State University with concentrations in constitutional law and political science with Summa Cum Laude honors and is currently pursuing a master’s in criminal justice at Texas State University.

Joshua Young (

Joshua Young is a consultant for KPMG’s Justice and Security practice where he oversees Criminal Justice Transformation initiatives which include projects such as: optimizing patrol schedules, redeveloping behavioral health diversion models for county governments, and work-load analysis in large complex jail systems.  Josh advises on a broad range of services and capabilities, including developing and implementing innovative, cost-efficient strategies to achieve a more customer-focused, data-driven, and proactive organization.

Prior to consulting, Josh served as a member of the Ventura Police Department’s SWAT team and Detective Bureau. He retired as a police Corporal after 12 years of service.

While an active duty police officer, Josh was the first line-level officer to successfully integrate a major randomized controlled trial (RCT) within a police organization. The RCT provided empirical answers around body cameras and their causal relationship on prosecution outcomes and the speed of prosecution. Additionally, Josh developed training curriculum now modeled by numerous agencies in three countries.

Josh is a co-founder and board member of the American Society of Evidence-Based Policing (ASEBP).

Ivonne Roman (

Ivonne Roman earned a Master of Public Administration with Distinction from Rutgers-Camden and was the recipient of the Public Policy Department Student Achievement Award for 2017 for research on Police Perceptions of Legitimacy and Procedural Justice.  Ivonne has over 20 years of experience in law enforcement, having served as the Chief of Police in Newark, NJ.  She ascended through the ranks, serving in various operational positions, internal affairs investigator, precinct commander, and chief of detectives for the Criminal Investigations Bureau.  She received the Director’s Award in 2008 for her work as the commander of the Gangs and Narcotics Bureau and received the Chief’s Award in 2012 for her management of the 2nd precinct.  She was a member of Newark’s Consent Decree negotiation team, in 2015. She is a Certified Public Manager and completed Labor Relations certification through Rutgers University.

Ivonne is a PhD candidate at Rutgers-Camden where her research focuses on the intersections of policing, public affairs and community building.  She has established a Women’s Leadership Academy (WLA) within the Newark Police Superior Officers’ Association.  The WLA mentors women interested in a career in law enforcement, with the goal of improving the retention rates of female police recruits.  The WLA also offers professional development opportunities for female officers interested in promotional advancement within the Newark Police Department.  Ivonne is a National Institute of Justice LEADS Scholar (Law Enforcement Advancing Data and Science), class of 2016, and an executive fellow at the Police Foundation.

Ashley Englefield (

Ashley Englefield is a 15 year veteran of the Sacramento Police Department in Northern California. Prior to becoming a police officer Ashley was a United States Marine and obtained a Bachelors degree in Information Systems from California State University Sacramento.

After his time in the patrol division, Mr. Englefield joined the Detective division and worked as an investigator in the narcotics, gangs, and eventually the homicide division. Ashley is currently employed by the Placer County District Attorney’s Office.

Mr. Englefield is a graduate of the University of Cambridge (UK) completing a Masters degree in Criminology.

Jonas Baughman

Sergeant Jonas Baughman is a 16-year veteran of the Kansas City Police Department (KCPD).  A native of the Kansas City area, Sergeant Baughman joined the KCPD after obtaining a B.A. in psychology from Creighton University.  He has held assignments in patrol, investigations, crime/intelligence analysis, and administration during his tenure.

Sergeant Baughman quickly found crime analysis to be his professional passion and ten of his sixteen years with the KCPD have been in positions related to crime or intelligence analysis.  He has served as a crime analyst; helped create the KCPD’s Real-time Crime Center and supervise its first team; and directed a squad of detectives tasked with gang intelligence.  He is currently assigned to the Office of the Chief of Police where he provides strategic analysis and other performance metrics to executive command staff to assist the Department’s crime-fighting efforts.

Sergeant Baughman’s primary interests include spatial analysis and predictive policing, as well as data mining and data visualization.  He is also interested in building upon his background in psychology through exploration of wellness programs for America’s law enforcement officers and their families.  Sergeant Baughman also feels there is much to be learned by working with international police departments, allowing law enforcement agencies to leverage best practices from across the globe.