Objectives

To examine differences in use of force by police patrol and specialized units, and the impact of body-worn cameras (BWCs) on use of force in these groups.

Methods

We use administrative data from the Tempe (AZ) Police Department collected during a randomized controlled trial (RCT) of BWCs. t tests of means and ARIMA models were constructed to analyze unit-level variation in use of force.

Results

Tempe officers in specialized units use substantially more force than patrol officers. BWCs had no impact on use of force among patrol officers but were associated with a significant decline in force among specialty unit officers who received BWCs in the second phase of the study.

Conclusion

Unit-level variations in force can have implications for selection, training, and other areas of police practice. Additionally, our findings show the necessity of accounting for group variation within departments when assessing the impact of BWCs on outcomes like use of force.

中文翻译：

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警察在巡逻和特种部队中使用武力的分布：生物武器公约影响的案例研究

目标

研究警察巡逻队和专业部队在使用武力方面的差异，以及随身摄像机 (BWC) 对这些群体使用武力的影响。

方法

我们使用在 BWC 的随机对照试验 (RCT) 期间收集的坦佩 (AZ) 警察局的行政数据。构建了均值t检验和 ARIMA 模型来分析部队使用中的单位级别变化。

结果

专门部队中的坦佩警官比巡逻警官使用的武力要多得多。BWC 对巡逻人员使用武力没有影响，但与在研究的第二阶段收到 BWC 的特种部队军官的武力显着下降有关。

结论

部队级别的变化可能会对警察实践的选择、培训和其他领域产生影响。此外，我们的研究结果表明，在评估 BWC 对使用武力等结果的影响时，有必要考虑部门内的群体差异。