Conducted Energy Devices (CEDs) and Citizen Injuries: The Shocking Empirical Reality

As one of the contemporary additions to the use of force spectrum, conducted energy devices (CEDs) have been surrounded by controversy. Such concerns have fueled a number of studies, many of which have attempted to examine the relationship between CEDs and citizen injuries. This limited body of research, however, has produced inconsistent results and suffers from a number of documented drawbacks. Drawing on data collected as part of a national multi‐agency use of force project, the current study analyzes nearly 14,000 use‐of‐force incidents across seven agencies, over 2,600 of which involve a CED, to assess the potential impact of CEDs on citizen injuries. In doing so, a series of multivariate statistical models are employed that isolate CED cases and compare them to a number of both hands‐on and weapon‐based tactics. Unlike previous research, which often highlights the beneficial aspects of CEDs in relation to injuries, our findings generally show an increased risk between the use of CEDs and citizen injuries. As such, more research is needed before deriving any conclusions as to the “safeness” of CEDs, especially in relation to the choice between using a CED or an alternative means of dispute resolution (either hands‐on physical force or another weapon).     

香港警队枪械训练对内地警察武器使用训练的启示

依法使用武器是法律赋予警察的权力，是维护社会治安、惩治违法犯罪、保护人民群众和警察生命安全的有力武器。而警察武器使用的训练是一个技能与法律法规密切结合的实战训练，也是一个不断发现问题和解决问题，熟能生巧的、有制度的、严格规范的、长期的、永恒的训练过程。香港警队的警务实战训练代表了世界最先进、最科学、最实用的训练水平，他们的枪械训练为内地警察武器使用的训练提供了很好的训练思路和训练方向。在目前形势下，我们应借鉴香港警队先进的训练理念和训练模式，开拓我们的思路，促使我们的警察武器使用训练发生质的变化，走上一个崭新的台阶，使训练与实际执法真正的结合起来。     

Examining fatal and nonfatal incidents involving the TASER

Research Summary According to TASER International, nearly 10,000 police departments in the United States have deployed the TASER as a less lethal force alternative in some capacity. Despite the TASER's increasing popularity, serious questions have been raised about the device's physiological side effects; in particular, Amnesty International has reported that more than 300 people have died after being subjected to the TASER. Although a growing body of research has examined the physiological effects of the TASER on animals and healthy human volunteers in laboratory settings, there has been virtually no empirical analysis of “real‐world” fatal and nonfatal TASER cases simultaneously. This article examines all media reports of TASER incidents from 2002 to 2006 through a comprehensive review of LexisNexis and New York Times archives. We compare TASER incidents in which a fatality occurred to TASER incidents in which a fatality did not occur and then employ multivariate analyses to identify the incident and suspect characteristics that are predictive of articles describing TASER‐proximate deaths. Policy Implications Several suspect factors were significantly associated with the reporting of a fatal TASER incident, including drug use (but not alcohol), mental illness, and continued resistance. Multiple deployments of the TASER against a suspect was also associated with the likelihood of the article describing a fatality—especially if the suspect was emotionally disturbed—which raises the possibility that the risk of multiple shocks might not be uniform for all suspects. More research is needed to explore the relationship between mental illness, drug use (illicit or therapeutic), continued resistance, and increased risk of death. In the meantime, police departments should develop specific policies and training governing the use of multiple TASER shocks against individuals who could be in these vulnerable physiological and psychological states.     

Striking Out: Race and Support for Police Use of Force

This research examines whites’ and blacks’ support for police use of force using a survey‐based experiment that varies the race of the offender across four different scenarios. Bivariate results show that the race of the offender influences blacks’ approval for the use of force by police, but does not affect whites’ approval. Multivariate analyses examine whether the factors influencing support for police use of force vary depending on the race of the offender. Results indicate that the predictors for approval of police use of force differ by the race of respondent, the race of offender, and the appropriateness of the use of force. The implications of the results for police–community relations are discussed.     

The verdict is in: how did they decide? Using drivers’ self-reported data to understand officers’ decision making during traffic stop encounters

ABSTRACT

In the United States, traffic stop is the most common form of police-citizen encounter, and for many citizens, it is the only way they will ever interact with the police. The frequency of traffic stop encounters has therefore attracted a significant research interest. In the past several years, researchers have attempted to explain the dynamics of these interactions, with the hope to change attitudes and influence policy formation. To supplement the efforts of previous researchers, the current effort analyzed self-reported data from citizens to understand police decision making at three decision points during traffic stop encounters. Specifically, the present study aims to answer three questions: what variables predict whether an officer will let a citizen go without doing anything or decide to do something? If the officer decides to do something, what influences the officer’s decision to choose an outcome over others? What are the drivers of use of force in traffic stop encounters? Results from the regression models suggest that reasons for the stop, verbal assault, officer and suspect characteristics are important predictors of police decision making behavior during traffic stop interaction. The findings have serious implications for developing better police-citizen relationships as well as improving public attitudes toward the local police.     

Pulse Variations of a Conducted Energy Weapon (Similar to the TASER® X26 Device): Effects on Muscle Contraction and Threshold for Ventricular Fibrillation*

Abstract: Conducted energy weapons (such as the Advanced TASER X26 model produced by TASER International), incapacitate individuals by causing muscle contractions. To provide information relevant to development of future potential devices, a “Modifiable Electronic Stimulator” was used to evaluate the effects of changing various parameters of the stimulating pulse. Muscle contraction was affected by pulse power, net/gross charge, pulse duration, and pulse repetition frequency. The contraction force increased linearly as each of these factors was increased. Elimination of a precursor pulse from X26‐like pulses did not have a significant effect on the normalized force measured. Muscle‐contraction force increased as the spacing increased from 5 to 20 cm, with no further change in force above 20 cm of spacing. Therefore, it is suggested that any future developments of new conducted energy weapons should include placement of electrodes a minimum of 20 cm apart so that efficiency of the system is not degraded. In the current study, the 50% probability of fibrillation level of X26‐like pulses ranged from 4 to 5 times higher than the X26 itself. Relatively large variations about the X26 operating level were found not to result in fibrillation or asystole. Therefore, it should be possible to design and build an X26‐type device that operates efficiently at levels higher than the X26.     

40‐Hz Square‐Wave Stimulation Requires Less Energy to Produce Muscle Contraction: Compared with the TASER® X26 Conducted Energy Weapon

Conducted energy weapons (CEWs) (including the Advanced TASER^® X26 model produced by TASER International, Inc.) incapacitate individuals by causing muscle contractions. In this study using anesthetized swine, the potential incapacitating effect of primarily monophasic, 19‐Hz voltage imposed by the commercial CEW was compared with the effect of voltages imposed by a laboratory device that created 40‐Hz square waves. Forces of muscle contraction were measured with the use of strain gauges. Stimulation with 40‐Hz square waves required less pulse energy than stimulation with the commercial CEW to produce similar muscle contraction. The square‐pulse stimulation, at the higher repetition rate, caused a more complete tetanus at a lower energy. Use of such a simple shape of waveform may be used to make future nonlethal weapon devices more efficient.     

警察武力之善法良治——论警察武力法的正义价值标准

警察武力法的正义价值标准由标示正义价值方向的基本理念和标示正义价值尺度的基本原则两项基本要件分级承担并贯彻。中国警察武力法有:社会正义与法律正义有机统一、保权与控权有机统一和价值、规范、事实有机统一三个居位"法上之法"的基本理念和危害行为与武力行为法定、危害行为与武力行为相当、武力行为克减和多样化和正当程序四个居位"法上之法"的基本原则。上述基本理念和基本原则,对系统理解、把握中国警察使用武力的基本原则和构成要件、各种规范的内在关连性,以及构思未来的、"应然"的中国警察武力立法具有不可或缺的重要意义。     

Revisiting Adoption of Conducted Energy Weapons (CEWs) by Canadian Police

This article focuses on the consequences of increasing patron–client relationships between manufacturers of Conducted Energy Weapons (CEWs) and Canadian police. It explicates the potential for institutional isomorphism in Canadian police. Four markers of isomorphic change in the policing field generated by the growing dependency of police on CEW manufacturers are highlighted. The article argues that the role CEW makers assume is intrinsically complex and contradictory and constitutes a gatekeeping, legitimizing, and ideationally (re)structuring process.     

The effects of supervisor education and training on police use of force

Police supervisors play a critical role in preventing unreasonable use of force. Despite their importance, only a few studies have examined the influences of supervisors on their subordinates’ daily practices, especially on their uses of police force. To bridge this gap, the current study explored the relationship between supervisors’ education level and use of force training and subordinate officers’ use of force practices. Using police use of force reports from 2004 to 2007 in a single urban police department, the current study examined how supervisor education and training impact on police use-of-force and found both highly educated and trained supervisors moderate their subordinate officers’ uses of higher levels of force.     

Police use of force: a transactional approach

Drawing on Tedeschi and Felson’s () theory of coercive actions for conceptual guidance as well as principles underlying the notion of a force continuum structure (i.e., proportionality and incrementalism), this research examines 3,544 police–suspect encounters from an observational study of the police in an attempt to better understand the transactional process of the police–suspect encounter. Results indicate, within the context of a force continuum structure, that officers escalated the level of force in about one of five encounters involving nonresistant suspects, and de‐escalated the level of force in three of four encounters involving resistant suspects. A series of logistic and multinomial regression models show that a number of factors differentially affect the manner in which officers apply force. The results suggest that before one can begin to judge the appropriateness of police force, one should measure and consider the extent to which force is applied proportionately and incrementally.     

A Molecular Method to Detect Wound Cells in Bloodstains Resultant of Sharp Force Injuries for Crime Scene Reconstruction

Previous research by the authors on an animal model showed that bloodstains can contain additional information about their somatic origin in the form of wound cells. Bloodstains produced by a gunshot wound to the head were distinguished from bloodstains produced by a gunshot wound to the chest by testing the stains for a brain microRNA marker. In this study, the effectiveness of the technique was examined on blood drops shed externally from a stab wound to the liver of rat carcasses. Specifically, investigations were conducted on the liver microRNA marker, rno‐mir‐122‐3p, with the QIAGEN miScript System, and PCR analysis. Between the two stabbing methods used, 67% of the scalpel blades and 57% of the blood drops tested positive for rno‐mir‐122‐3p; however, other samples tested negative giving inconclusive results as to the wound‐of‐origin. The amount of the liver cells in the bloodstains appeared to be related to the extent of trauma.     

Police shooting and criminal homicide: The temporal relationship

This study examines the temporal relationship between the incidence of police shooting and the incidence of criminal homicide for New York City between 1971 and 1975. The research finds that there is no temporal relation between the incidence of police shooting and the incidence of criminal homicide and concludes that the very strong and widely supported cross-sectional correlation between police shooting and criminal homicide is spurious, not causal.     

Advancing police use of force research and practice: urgent issues and prospects

Leading police scholars and practitioners were asked to reflect on the most urgent issues that need to be addressed on the topic of use of force. Four themes emerged from their contributions: use of force and de-escalation training needs to improve and be evaluated; new ways of conceptualizing use of force encounters and better use of force response models need to be developed; the inequitable application of force, and how to remediate biases, needs to be more fully understood; and misconceptions about police use of force need to be identified and corrected. The highlighted topics serve as an agenda for future research. Such research should provide greater insight into when, where, and why force is used by police officers, and how it can be applied appropriately. If implemented, the practical recommendations included in the contributions should have a positive impact on police performance, public trust and confidence in the police, and citizen and officer safety.     

The malleability of attitudes toward the police: immediate effects of the viewing of police use of force videos

Purpose: To examine whether videos of controversial police interventions shape individual opinion and, consequently, if attitudes towards use of force are malleable in the short-term. Methodology: A self-administered survey was conducted among 248 undergraduate students as part of a larger project on attitudes towards police use of force. Two groups of respondents were asked general questions about the police: one group was shown fictional videos of controversial police interventions just prior to completing the questionnaire; the other was not. Findings: Results strongly suggest that videos of police interventions have significant effects on reported opinions about use of force: the group that watched the videos was more likely to report that the police frequently use force. Implications: The wide distribution of images by police organizations might have unexpected adverse effects on public attitudes.     

The ‘us vs them’ mentality: a comparison of police cadets at different stages of their training

ABSTRACT

Any depiction of police culture includes a strong ‘us versus them’ element, but research has been unable to satisfactorily explain its development and evolution. In particular, very few studies have focused on the training period, between when an individual chooses a police career and his/her first day as an officer. A total of 1,979 pre-university students from seven colleges in Quebec (Canada) completed a self-administered survey where they had to answer general questions about the police followed by specific questions about four realistic videos of fictional police interventions involving use of force. Unsurprisingly, the analysis suggests that students in Police Technology tend to think they are more supportive of the police and the use of force than students in other programs. However, students in Police Technology increasingly indicate that the majority of people would report a more negative opinion than they have, suggesting that police candidates increasingly disidentify with the rest of the population.     

Functioning and Effectiveness of Electronic Control Devices Such as the TASER® M‐ and X‐Series: A Review of the Current Literature

Abstract: Conducted electrical weapons (CEWs) such as the TASER^® M‐ and X‐series deliver short high‐voltage, low‐current energy pulses to temporarily paralyze a person by causing electrical interruption of the body’s normal energy pulses. Despite many scientific publications, which classify the health risks of an appropriate use of the TASER device as minor, there still is a continuous uncertainty about possible side effects with human application. Based on a literature search of the National Library of Medicine’s MEDLINE database’s PubMed system of current publications, the following article describes the mechanisms by which the device operates and discusses possible pathophysiological consequences. The majority of current human literature has not found evidence of clinical relevant pathophysiological effects during and after an exposure of professionally applied CEWs. However, to be able to exclude possible health risks, a medical checkup of people who have been exposed to CEWs is essential.     

Police use of force: an examination of the minority threat perspective

The minority threat perspective suggests that the criminal justice system may be one mechanism through which the majority group (i.e. Whites) maintains control of culturally dissimilar minority groups. Although numerous studies have examined the relationship between minority representation and various policing outcomes, few have extended this research to police use of force in the context of stop-and-frisk practices. Using stop, question, and frisk data from the New York Police Department, this study examines (1) whether racial and ethnic composition influences police use of force, and (2) whether an individual’s race/ethnicity interacts with the racial/ethnic composition of a police precinct to produce disparities in police use of force. The results provide partial support for the minority threat perspective.     

Situational factors and police use of force across micro-time intervals: A video systematic social observation and panel regression analysis

The current study analyzes police use of force as a series of time-bound transactions between officers, civilians, and bystanders. The research begins with a systematic social observation of use-of-force events recorded on police body-worn cameras in Newark, New Jersey. Researchers measure the occurrence and time stamps for numerous participant physical and verbal behaviors. Data are converted into a longitudinal panel format measuring all observed behaviors in 5-second intervals. Panel logistic regression models estimate the effect of each behavior on use of force in immediate and subsequent temporal periods. Findings indicate certain variables influence use of force at a distinct point in time, whereas others exert influence on use of force across multiple time periods. The most influential variables relate to authority maintenance theoretical constructs. This finding supports prior perspectives arguing that police use of force largely results from officer attempts to maintain constant authority over civilians during face-to-face encounters. Nonetheless, a range of additional variables reflecting procedural justice, civilian resistance, and bystander presence significantly affect when police use force during civilian encounters. Results provide nuance to theoretical frameworks considering use of force as resulting from the interplay between officer and civilian actions and reactions.     

Justifying violence: legitimacy,ideology and public support for police use of force

Under what conditions do people support police use of force? In this paper we assess some of the empirical links between police legitimacy, political ideology (right-wing authoritarianism and social dominance orientation), and support for ‘reasonable’ use of force (e.g. an officer striking a citizen in self-defence) and ‘excessive’ use of force (e.g. an officer using violence to arrest an unarmed person who is not offering violent resistance). Analysing data from an online survey with US participants (n?=?186) we find that legitimacy is a positive predictor of reasonable but not excessive police use of force, and that political ideology predicts support for excessive but not reasonable use of force. We conclude with the idea that legitimacy places normative constraints around police power. On the one hand, legitimacy is associated with increased support for the use of force, but only when violence is bounded within certain acceptable limits. On the other hand, excessive use of force seems to require an extra-legal justification that is – at least in our analysis – partly ideological. Our findings open up a new direction of research in what is currently a rather sparse psychological literature on the ability of legitimacy to ‘tame’ coercive power.