Over the past few years, several events have highlighted the strained relationship between the police and residents in many communities. Police officer body-worn cameras (BWCs) have been advocated as a tool by which police-community relations can be strengthened, while simultaneously increasing transparency and accountability of police departments. Support for BWCs from the public and federal government is strong, and some studies have examined police perceptions of BWCs. However, comparisons of officer perceptions of BWCs in different departments are lacking, as are assessments of officer attitudes pre-and post-BWC deployment. This study compares officer perceptions of BWCs in three police departments in the western United States between 2013 and 2015, both before and after BWC program implementation. The similarities and differences among officer perceptions across departments are examined, and the authors consider the implications of findings for police departments moving forward with BWC technology.

One of the most compelling perceived benefits of body-worn cameras (BWCs) involves the potential for reductions in citizen complaints and police use of force. A handful of early studies reported significant reductions in both outcomes following BWC adoption, but several recent studies have failed to document such effects. The current study explores this question using data from a randomized controlled trial conducted in the Spokane (WA) Police Department. Approximately half of patrol officers (n = 82) were assigned BWCs in May 2015, while the other half (n = 67) received their BWCs 6 months later (November 2015). The study explores the effects of BWCs on use of force, complaints against officers, and officer injuries, using more than three years of official department data pre-and post-BWC deployment. The outcomes of interest are rare in Spokane, which limited both statistical power and the results from significance testing. However, the within-group trends are consistent with a positive effect, particularly for percent change. Following BWC deployment, the percentage of officers with a complaint in each group declined by 50% and 78% (Control and Treatment, respectively); the percentage of officers with a use of force declined notably (39%) for one group only. The reductions disappeared after 6 months for the Treatment group. There was no relationship between BWCs and officer injuries. The authors discuss the implications of the findings for the ongoing dialogue on BWCs.

Research Summary We explore integration and acceptance of body‐worn cameras (BWCs) among police, citizens, and stakeholders in one jurisdiction (Tempe, AZ) that adhered to the U.S. Department of Justice's (U.S. DOJ's) BWC Implementation Guide. We assess integration and acceptance through (a) officer surveys pre‐ and postdeployment, (b) interviews with citizens who had recent police encounters, and (c) interviews with external stakeholders. We also analyze (d) officer self‐initiated contacts, (e) misdemeanor court case time to disposition, and (f) case outcomes. We found high levels of BWC acceptance across all groups. Officer proactivity remained consistent. Time‐to‐case disposition and the rate of guilty outcomes both trended in positive directions. Policy Implications Although the results of early research on BWCs showed positive impacts, the findings from recent studies have been mixed. Implementation difficulties may explain the mixed results. Planning, implementation, and management of a BWC program are complex undertakings requiring significant resources. The technology also generates controversy, so the risk of implementation failure is substantial. The findings from our study demonstrate that adherence to the U.S. DOJ BWC Implementation Guide can lead to high levels of integration and acceptance among key stakeholders.

In previous studies, 90% partial hepatectomy in the rat was invariably accompanied by 100% mortality within 40 hr. This paper describes a technique by which 90% of the liver mass can be removed with only 14% mortality, provided that rats have free access to glucose-containing drinking water. Measurements of total liver DNA, [3H]thymidine labeling index and mitotic index suggest rapid cell proliferation, commensurate with a powerful regenerative stimulus. In the presence of normoglycemia, peripheral insulin and glucagon concentrations were elevated to levels normally observed in the portal vein.

Objective-To investigate the impact of the clinical course of the primary HIV infection on the subsequent course of the infection.Design-Prospective documenting of seroconversion, follow up at six month intervals, and analysis of disease progression by life tables.