By Christopher M. Sun, James R. “Chip” Coldren, Jr.Keri RichardsonEmma Wohl

Law enforcement agencies continue to develop new and innovative strategies to better support and police the communities they serve, from integrating gunshot detection technologies into dispatch systems to improve response times during shootings, to collaborating with local health and social service organizations to address issues such as homelessness or substance abuse in comprehensively ways. Over the past 10 years, the Bureau of Justice Assistance (BJA), in partnership with the CNA Institute for Public Research (IPR), has supported law enforcement agencies across the country in implementing innovative policing approaches through the Strategies for Policing Innovation Initiative (SPI, formerly the Smart Policing Initiative). SPI supports not only the development and implementation of innovative policing strategies, but also the research partnerships that result in in-depth analyses and rigorous evaluations of these strategies to advance what is known about effective and efficient policing practices. This report examines SPI’s accomplishments since its inception in 2009 and explores some of the major themes across SPI initiatives in both policing and policing research, including the following:

• Reductions in violent crime

• Improved crime analysis capabilities in police agencies

• Evolution of research partnerships with SPI sites

• Collaborative partnerships with agencies, organizations, and community stakeholders

• Integration of technology into policing

Arlington, VA: CNA, 2019. 20p.

By Robin S. Engel, Hannah D. McManus, and Gabrielle T. Isaza

In post-Ferguson America, police departments are being challenged to implement evidence-based changes in policies and training to reduce fatal police-citizen encounters. Of the litany of recommendations believed to reduce police shootings, five have garnered widespread support: body-worn cameras, de-escalation training, implicit bias training, early intervention systems, and civilian oversight. These highly endorsed interventions, however, are not supported by a strong body of empirical evidence that demonstrates their effectiveness. guided by the available research on evidence-based policing and informed by the firsthand experience of one of the authors in implementing departmental reforms that followed the fatal shooting of a civilian by an officer, this article highlights promising reform strategies and opportunities to build the evidence base for effective use-of-force reforms. We call upon police executives to engage in evidence-based policing by scientifically testing interventions, and we call on academics to engage in rapid research responses for critical issues in policing.

Annals of the American Academy of Political and Social Science, 687(1), 146–165. 2020

By Anthony A. Braga

Clearance rates for fatal and nonfatal shootings, especially cases involving gang- and drug-related violence, are disturbingly low in many American cities. Low clearance rates undermine police efforts to hold offenders accountable, to disrupt cycles of gun violence, and to provide justice to victims. The prevailing view has been that follow-up investigations are of limited value because crimes are primarily cleared by patrol officers making on-scene arrests and through eyewitnesses and forensic evidence at the crime scene. Other research, however, suggests that the work of criminal investigators can increase the likelihood that crimes might be cleared through arrest. After years of homicide clearance rates that were lower than the national average, the Boston Police Department engaged a research and development enterprise to improve their posthomicide criminal-investigation processes and practices. A rigorous evaluation found that the intervention significantly increased key investigative activities and improved clearance rates relative to existing homicide clearance trends in other Massachusetts and U.S. jurisdictions. This research enterprise was extended to compare city investigative resources invested in clearing gun-homicide cases relative to nonfatal gun assaults. The study found that gun homicides and nonfatal shooting cases shared very similar characteristics. However, higher clearance rates for gun homicides relative to nonfatal shootings were primarily a result of sustained investigative effort in homicide cases made following the first two days. Police departments should invest additional resources in the investigation of nonfatal gun assaults. When additional investigative effort is expended, law enforcement improves its success in gaining the cooperation of key witnesses and increases the amount of forensic evidence collected and analyzed.

New York: The Manhattan Institute, 2021. 15p.

By David Klinger

What's it like to have official sanction to shoot and kill? In this brilliantly written, controversial, and compelling book, author David Klinger - who himself shot and killed a suspect during his first year as an officer in the Los Angeles Police Department - answers this and many other questions about what it's like to live and work in the place where police officers have to make split-second decisions about life and death: The Kill Zone.

Klinger, now a university professor, writes eloquently about what happens when police officers find themselves face-to-face with dangerous criminals, the excruciating decisions they have to make to shoot or to hold their fire, and how they deal with the consequences of their choices.

San Francisco. Jossey-Bass. 2004. 304p.

By Eric Piza and Victoria A. Sytsma 

  The current study applies Systematic Social observation (SSO) to body-worn camera (BWC) footage of use of physical force events in Newark, NJ. The analysis tests the effect of suspect resistance and police officer interpersonal and informational justice tactics on time until use of physical force in police-citizen encounters. The results indicate police officer actions have a greater effect on the time until physical force than does suspect resistance. Officer adherence to informational justice is negatively associated to the time until both first use of force and highest level of force. Suspect resistance did not achieve statistical significance in any model. This study has implications for research and police practice, and demonstrates the benefits of leveraging video footage in criminological research.

Crime & Delinquency 2022.

By 21CP Solutions.

From the Introduction: The President’s Task Force on 21st Century Policing was established by Executive Order under then President Barack Obama on December 18, 2014. President Obama charged the task force with identi- fying best practices and offering recommendations on how policing practices can promote effective crime reduction while building public trust. Since the publication of the task force’s final report in May 2015, there have been more than 133 national, state, or local task forces, councils, and working groups responding to police violence in communities throughout the country.1

The nation remains in a policing crisis, and too many poor communities of color face the adverse conditions of poverty and economic exclusion that aggravate the relationship between communities and police. The 2015 report by the President’s Task Force on 21st Century Policing remains a significant influence on policing reform, but the country still confronts police violence that undermines community trust and confidence.

Task Force on 21st Century Policing: A Renewed Call to Action. Chicago: 21CP Solutions, LLC. 2023. 40p.

Deaths of civilians at the hands of on-duty police are in the national spotlight as never before. How many killings by police occur annually? What circumstances provoke police to shoot to kill? Who dies? The lack of answers to these basic questions points to a crisis in American government that urgently requires the attention of policy experts. When Police Kill is a groundbreaking analysis of the use of lethal force by police in the United States and how its death toll can be reduced.

Cambridge, MA: London: Harvard University Press, 2017. 321p.

By Desmond Ang, Panka Bencsik, Jesse Bruhn and Ellora Derenoncourt

How do high-profile acts of police brutality affect public trust and cooperation with law enforcement? To investigate this question, we develop a new measure of civilian crime reporting that isolates changes in community engagement with police from underlying changes in crime: the ratio of police-related 911 calls to gunshots detected by ShotSpotter technology. Examining detailed data from eight major American cities, we show a sharp drop in both the call-to-shot ratio and 911 call volume immediately after the police murder of George Floyd in May 2020. Notably, reporting rates decreased significantly in both non-white and white neighborhoods across the country. These effects persist for several months, and we find little evidence that they were reversed by the conviction of Floyd’s murderer. Together, the results illustrate how acts of police violence may destroy a key input into effective law enforcement and public safety: civilian engagement and reporting.

Cambridge, MA: Working paper, Harvard Kennedy School, 2021. 27p.

By Roger Matthews

Armed robbery is a relatively rare but very serious crime, and the police response therefore needs to be as effective as possible. The importance of this is reflected by the national key objective on violent crime, and by the creation of the ACPO Armed Criminality Working Group whose advice was recently published in ‘Tackling Crime Effectively: Management Handbook 2’. This report summarises what is known about the extent and nature of armed robbery nationally, highlighting the very welcome reductions in the number of these crimes in 1994 and 1995. It goes on to examine the policing strategies in two very different forces - the Metropolitan Police and South Yorkshire Police - showing how the police response can be tailored to the particular environment and local circumstances. The value of proactive police work and the use of informants is clearly demonstrated in the Metropolitan Police, while the speed and quality of response to incidents was important in South Yorkshire.

London: Home Office Police Research Group, 1996. 58p.