By Morgan C. Williams Jr., Nathan Weil, Elizabeth A. Rasich, Jens Ludwig, Hye Chang, and Sophia Egrari

Body-worn cameras (BWCs) are an increasingly common tool for police oversight, accountability, and transparency, yet there remains uncertainty about their impacts on policing outcomes. This paper reviews what we know about the benefits of BWCs and how those benefits compare to the costs of this new technology. We make two contributions relative to existing research. First, we update prior meta-analyses of studies of the impacts of BWCs on policing outcomes to incorporate the most recent, and largest, studies carried out to date in this literature. This additional information provides additional support for the idea that cameras may affect a number of policing outcomes that are important from a social welfare perspective, particularly police use of force. Second, we carry out a benefit-cost analysis of BWCs, as financial barriers are often cited as a key impediment to adoption by police departments. Our baseline estimate for the benefit-cost ratio of BWCs is 4.95. Perhaps as much as one-quarter of the estimated benefits accrue to government budgets directly, which suggests the possibility that this technology could, from the narrow perspective of government budgets, even pay for itself.

Chicago: Becker Friedman Institute, University of Chicago, 2021. 32p.

By Philip Matthew Stinson, Sr., John Liederbach, Steven P. Lab and Steven L. Brewer, Jr

There are no comprehensive statistics available on problems with police integrity, and no government entity collects data on all criminal arrests of law enforcement officers in the United States. Police crimes are those crimes committed by sworn law enforcement officers with the general powers of arrest. These crimes can occur while the officer is either on- or off-duty and include offenses committed by officers employed by state and local law enforcement agencies. This study provides a wealth of data on a phenomena that relates directly to police integrity— data that previously did not exist in any useable format. The first goal of the study is to determine the nature and extent of police crime in the United States. The objective for this goal is to determine the incidence and prevalence of officers arrested. A second goal is to determine what factors influence how an agency responds to arrests of its officers.

Bowling Green, OH: Bowling Green State University, 2016. 671p.

By Priscillia Hunt, Jessica Saunders and John S. Hollywood

Even though there is a growing interest in predictive policing, to date there have been few, if any, formal evaluations of these programs. This report documents an assessment of a predictive policing effort in Shreveport, Louisiana, in 2012, which was conducted to evaluate the crime reduction effects of policing guided by statistical predictions. RAND researchers led multiple interviews and focus groups with the Shreveport Police Department throughout the course of the trial to document the implementation of the statistical predictive and prevention models. In addition to a basic assessment of the process, the report shows the crime impacts and costs directly attributable to the strategy. It is hoped that this will provide a fuller picture for police departments considering if and how a predictive policing strategy should be adopted.

There was no statistically significant change in property crime in the experimental districts that applied the predictive models compared with the control districts; therefore, overall, the intervention was deemed to have no effect. There are both statistical and substantive possibilities to explain this null effect. In addition, it is likely that the predictive policing program did not cost any more than the status quo.

Santa Monica, CA: RAND, 2014. 88p.

ByTanaya Devi and Roland G. Fryer Jr,

This paper provides the first empirical examination of the impact of federal and state "Pattern-or-Practice" investigations on crime and policing. For investigations that were not preceded by "viral" incidents of deadly force, investigations, on average, led to a statistically significant reduction in homicides and total crime. In stark contrast, all investigations that were preceded by "viral" incidents of deadly force have led to a large and statistically significant increase in homicides and total crime. We estimate that these investigations caused almost 900 excess homicides and almost 34,000 excess felonies. The leading hypothesis for why these investigations increase homicides and total crime is an abrupt change in the quantity of policing activity. In Chicago, the number of police-civilian interactions decreased by almost 90% in the month after the investigation was announced. In Riverside CA, interactions decreased 54%. In St. Louis, self-initiated police activities declined by 46%. Other theories we test such as changes in community trust or the aggressiveness of consent decrees associated with investigations -- all contradict the data in important ways.

Cambridge, MA: National Bureau of Economic Research, 2020. 63p.

By Sungwoo Cho, Felipe Gonçalves, and Emily Weisburst

Do reductions in arrests increase crime? We study line-of-duty deaths of police officers, events that likely impact police behavior through increased fear but are unlikely to directly impact civilian behavior. Officer deaths cause significant short-term reductions in all arrest types, with the largest reductions in arrests for lower-level offenses. In contrast, we find no evidence of an increase in crime or a change in victim reporting through 911 calls. There is also no apparent threshold of arrest decline beyond which crime increases. Our findings suggest that enforcement activity can be reduced at the margin without incurring public safety costs.

Bonn, Germany: IZA – Institute of Labor Economics , 2021. 69p.

By Aaron Chalfin, David Mitre-Becerril and Morgan C. Williams, Jr.

In December 2014 and January 2015, police officers in New York City engaged in an organized slowdown of police work to protest the murder of two police officers who were targeted by a gunman while sitting in their patrol car. An influential 2017 article in Nature Human Behaviour studies the effect of the NYPD’s work slowdown on major crimes and concludes that the slowdown led to a significant improvement in public safety. Contrary to the remainder of the literature, the authors conclude that proactive policing can cause an increase in crime. We re-evaluate this claim and point out several fatal weaknesses in the authors’ analysis that call this finding into question. In particular, we note that there was considerable variation in the intensity of the slowdown across NYC communities and that the communities which experienced a more pronounced reduction in police proactivity did not experience the largest reductions in major crime. The authors’ analysis constitutes a quintessential example of an ecological fallacy in statistical reasoning, a logical miscalculation in which inferences from aggregated data are mistakenly applied to a more granular phenomenon. We raise several additional and equally compelling concerns regarding the tests presented in the paper and conclude that there is little evidence that the slowdown led to short-term changes in major crimes in either direction.

Department of Criminology, University of Pennsylvania. Department of Economics, Barnard College, Columbia University , 2021. 38p.

By Bocar A. Ba and Roman G. Rivera

Does policing the police increase crime? We avoid simultaneity effects of increased public oversight during a major scandal by identifying events in Chicago that only impacted officers’ self-imposed monitoring. We estimate crime’s response to self- and public-monitoring using regression discontinuity and generalized synthetic control methods. Self-monitoring, triggered by police union memos, significantly reduced serious complaints without impacting crime or effort. However, after a scandal, both civilian complaints and crime rates rise, suggesting that higher crime rates following heightened oversight results from de-policing and civilian behavior simultaneously changing. Our research suggests that proactive internal accountability improves police-community relations without increasing crime.

Philadelphia: University of Pennsylvania Carey Law School, 2019. 89p.

By Desmond Ang

Nearly a thousand officer-involved killings occur each year in the United States. This paper documents the large, racially-disparate impacts of these events on the educational and psychological well-being of Los Angeles public high school students. Exploiting hyperlocal variation in how close students live to a killing, I find that exposure to police violence leads to persistent decreases in GPA, increased incidence of emotional disturbance and lower rates of high school completion and college enrollment. These effects are driven entirely by black and Hispanic students in response to police killings of other minorities and are largest for incidents involving unarmed individuals.

Cambridge, MA: Harvard University, Kennedy School of Government, 2020. 81p.

The synthetic opioid crisis in North America has increased fatal overdose rates to unprecedented levels within a matter of a few years. It involves new technologies, a new source of supply (the chemical industry in China), and new forms of distribution (the internet and mail). These elements are perhaps even more difficult to suppress than other supply sources from foreign countries. This has led to an assumption that nothing can be learned from prior experience in trying to control drug markets.

This paper applies the insights of the “focused deterrence” approach developed by David Kennedy and Mark Kleiman, which involves using multiple levers to attain a specific policy goal. We conclude with some specific suggestions for local and national supply-control agencies— including the need to focus more on regulating rather than reducing markets to minimize harm, and to distinguish between markets not yet swamped by fentanyl or in transition and those where the drug is entrenched. Strategies appropriate in one context may not serve well in another.

Washington, DC: The Brookings Institution, 2020. 21p.

By Law Library of Congress, Global Legal Research Center

This report examines the weapons and equipment generally at the disposal of law enforcement officers in several countries around the world. It also provides, for each of these countries, a brief overview of the rules governing the use of weapons by law enforcement officers. Precise and reliable information on the weapons and equipment of some countries’ police forces was often difficult to find. Nevertheless, certain interesting facts and patterns emerged from the Law Library’s research.

Washington, DC: Law Library of Congress, Global Legal Research Center, 2014. 106p.

By International Union of Railways

Metal theft is a big problem for railway networks as thieves target signalling cables, overhead power lines and even metal fences to sell it for scrap. Railway networks are designed to fail safe, which means that when a cable is cut, trains are brought to a stop. This protects passengers but can lead to long and frustrating delays while the problem is examined and fixed safely. This type of crime causes considerable disruptions and the costs that are associated with replacing and repairing the damage often massively exceed the value of the metal stolen. Loss of communication networks and damage to railway tracks also raise public safety concerns. A large proportion of railway networks funds come from the government, so these thefts are, ultimately, at the taxpayer’s expense. It is clear that the stolen metal is often transported across several borders and sold as scrap or for recycling far away from the actual scene of the crime. Thus, both national and international cooperation and collaboration initiatives are needed to raise awareness, provide expertise and best practice to allow the exchange of ideas between all parties involved. Therefore, only a structured and common approach can provide a wide and extended set of solutions.

Paris: International Union of Railways, 2013. 12p.

By U.S. Department of Energy. Office of Electricity Delivery and Energy Reliability

The U.S. Department of Energy (DOE), Office of Electricity Delivery and Energy Reliability (OE) monitors changes, threats, and risks to the energy infrastructure in the United States. As part of that responsibility, OE published research in 2007 on the theft of copper wire from electric utilities. Early in 2010 there was evidence of an increase in such thefts. Because of this increase, OE decided to update its 2007 assessment of copper wire thefts. 1 • Electric utilities have launched public awareness campaigns, offered rewards for information leading to the arrest and conviction of thieves, marked copper wire for easier recovery from scrap metal dealers, and collaborated with stakeholders. Copper wire theft continues today throughout the United States, but the magnitude of theft has been reduced considerably. The problem is not likely to cease as long as copper prices remain sufficiently attractive to would-be thieves. However, the combined efforts of electric utilities, lawmakers, scrap metal dealers, and local law enforcement have succeeded in reducing the problem and driving a wedge between copper price increases and comparable increases in copper theft. • Legislation to reduce copper theft has been introduced in every State and passed into law in all but five States as of August 2010. • Scrap metal dealers are cooperating with utilities and lawmakers, reporting suspected thefts, and disseminating information through ISRI’s Theft Alerts. • Local law enforcement has become more responsive to electric utilities facing copper theft and is collaborating to recover more stolen copper and arrest those responsible. Since the beginning of the 2004 spike in copper prices, copper theft and copper prices have been directly linked. Although this link continues today, the rate of thefts as a function of the upward pull of prices has been mitigated

Washington DC: The Department, 2010. 17p.

By Ross Deuchar, Liz Frondigoun and Catherine Davidones

The aim of this study was to evaluate the introduction of Police Scotland’s extended use of Conductive Energy Devices (Tasers). It was focused around the following key objectives: 1. To explore and examine the pre- and post-change perceptions of police officers, key members of stakeholder groups and community representatives regarding the Specially Trained Officer (STO)/Taser rollout, with a specific focus on: a. the extent to which perceived resilience, confidence and personal safety among officers is enhanced as a result of the deployment of STOs with Tasers. b. the perceived impact of the rollout of STOs/Tasers on public reassurance and safety, and the perceived benefits and risks. 2. To identify any remaining challenges with the Taser rollout and make recommendations for the future.

Edinburgh: Scottish Institute for Policing Research, 2019. 37p.

By Kristy Docherty and Brigid Russell

The purpose of this report is to present the findings of the evaluation of the Police Scotland and Local Government Collaborative Leadership Pilots (hereafter referred to as ‘the programme’). This evaluation has been undertaken independently by Dr Kristy Docherty and Brigid Russell on behalf of the Scottish Institute for Policing Research (SIPR) between August 2021 and February 2022. The objectives of the evaluation were: • To critically examine the programme. • To capture and analyse information about the activities, processes, characteristics, and outcomes of the programme. • To offer insights and suggestions for future action with the purpose of improving programme effectiveness, and/or to inform and shape future programme decisions. It is important to note that our evaluation took place while the programme was still running, participants were at various stages and they had not completed all of their sessions. This ‘formative’ approach was deliberate and links in principle with the embedded evaluation process adopted by the facilitation team.

Edinburgh: Scottish Institute for Policing Research. 2022. 68p.

By Ana María Ibáñez, Amy Ritterbusch, Catherine Rodríguez

This paper uses a natural experiment to identify the impact of a judicial system reform on police behavior. The study finds that, after a decrease in the severity of judicial punishment imposed on Colombian adolescents, arrest rates for adolescents in most misdemeanor crimes decreased due to a change in police behavior. The magnitude of this effect ranged between 0.08 to 0.321 standard deviations. The uncertainty on how to operate the new system, the lack of training, and the potential disciplinary sanctions led police officials to reduce arrest rates. Nonetheless, police forces learned gradually how to operate within the new system and adjusted their operations, countervailing the initial negative impact on arrest rates. We present suggestive evidence that the reduction in arrest rates and the lower sanctions increased crime incidents in cities with a large proportion of adolescents in their population. Qualitative evidence collected in focus groups with police officials supports the principal quantitative findings and contextualize the obstacles that led to the decrease in arrest rates and the perceived increase of juvenile crime based on the officials' experiences in the streets.

Bogotá, Colombia: Universidad de los Andes–Facultad de Economía–CEDE, 2017, 36p

By Laura E. Joyce

Representations of forensic procedures saturate popular culture in both fiction and true crime. One of the most striking forensic tools used in these narratives is the chemical luminol, so named because it glows an eerie greenish-blue when it comes into contact with the tiniest drops of human blood. Luminol is a deeply ambivalent object: it is both a tool of the police, historically abused and misappropriated, and yet it offers hope to families of victims by allowing hidden crimes to surface. Forensic enquiry can exonerate those falsely accused of crimes, and yet the rise of forensic science is synonymous with the development of the deeply racist ‘science’ of eugenics. Luminol Theory investigates the possibility of using a tool of the state in subversive, or radical, ways. By introducing luminol as an agent of forensic inquiry, Luminol Theory approaches the exploratory stages that a crime scene investigation might take, exploring experimental literature as though these texts were ‘crime scenes’ in order to discover what this deeply strange object can tell us about crime, death, and history, to make visible violent crimes, and to offer a tangible encounter with death and finitude. At the luminol-drenched crime scene, flashes of illumination throw up words, sentences, and fragments that offer luminous, strange glimpses, bobbing up from below their polished surfaces. When luminol shines its light, it reveals, it is magical, it is prescient, and it has a nasty allure

Santa Barbara, CA: Punctum Books, 2017. 137p.

By Maurice Punch

Policing and corruption are inseparable. This book argues that corruption is not one thing but covers many deviant and criminal practices in policing which also shift over time. It rejects the 'bad apple' metaphor and focuses on 'bad orchards', meaning not individual but institutional failure. For in policing the organisation, work and culture foster can encourage corruption. This raises issues as to why do police break the law and, crucially, 'who controls the controllers'?

Corruption is defined in a broad, multi-facetted way. It concerns abuse of authority and trust; and it takes serious form in conspiracies to break the law and to evade exposure when cops can become criminals. Attention is paid to typologies of corruption (with grass-eaters, meat-eaters, noble-cause); the forms corruption takes in diverse environments; the pathways officers take into corruption and their rationalisations; and to collusion in corruption from within and without the organization. Comparative analyses are made of corruption, scandal and reform principally in the USA, UK and the Netherlands. The work examines issues of control, accountability and the new institutions of oversight. It provides a fresh, accessible overview of this under-researched topic for students, academics, police and criminal justice officials and members of oversight agencies.

Cullompton, Devon, UK: Willan Publishing, 2009. 296p.

By P.A.J. Waddington

This analysis of policing throughout the modern world demonstrates how many of the contentious issues surrounding the police in recent years - from paramilitarism to community policing - have their origins in the fundamentals of the police role. The author argues that this results from a fundamental tension within this role. In liberal democratic societies, police are custodians of the state's monopoly of legitimate force, yet they also wield authority over citizens who have their own set of rights.

London; Philadelphia: UCL Press, 1999. 312p.

By Rob C. Mawby

The major areas of research covered in this study of the influence of the media on police work are covered in eight chapters. In chapter 1 a History of Police Image Work From 1829 to 1987 traces the history of image work. Chapter 2 the Professionalizing of Police Image Work Since 1987 discusses the distinguishing features of the most recent phase of police image work. Chapter 3 Police Legitimacy, Communication and the Public Sphere introduces theoretical concerns, and the nature of police communications. Chapter 4 the National Picture: Systems of Police Image Work looks at the terrain of contemporary image work across the police service nationally. Chapter 5 One Force and Its Image provides historical background of the force and outlines the 1984-85 Miners' Strike and the 1989 Hillsborough tragedy. Chapter 6 Press and Public Relationship Officers At Work examines news management and the planning and delivery of set piece promotional events. Chapter 7 Image Work in Routine Policing looks at three areas of practical policing. In the final chapter, Image Work, Police Work and Legitimacy the author considers the extent to which image work pervades contemporary police work and the implications for policing in the context of a highly mediated society. The study concludes that the mass media has played an important role in shaping police work, image work, the legitimization of policing. The media and the police will continue to work together to influence policing and society.

Cullompton, Devon, UK: Willan Publishing, 2002. 226p.

Edited by Michael Dean Reisig; Robert J Kane

The police are perhaps the most visible representation of government. They are charged with what has been characterized as an "impossible" mandate -- control and prevent crime, keep the peace, provide public services -- and do so within the constraints of democratic principles. The police are trusted to use deadly force when it is called for and are allowed access to our homes in cases of emergency. In fact, police departments are one of the few government agencies that can be mobilized by a simple phone call, 24 hours a day, 7 days a week. They are ubiquitous within our society, but their actions are often not well understood. The Oxford Handbook of Police and Policing brings together research on the development and operation of policing in the United States and elsewhere.

Oxford, UK; New York: Oxford University Press, 2014. 697p.