Objectives

Evaluate the impact of body-worn cameras (BWCs) on officer-initiated activity, arrests, use of force, and complaints.

Methods

We use instrumental variable analysis to examine the impact of BWC assignment and BWC activation on the outcomes of individual incidents through a randomized controlled trial of 436 officers in the Phoenix Police Department.

Results

Incidents involving BWC activations were associated with a lower likelihood of officer-initiated contacts and complaints, but a greater likelihood of arrests and use of force. BWC assignment alone was unrelated to arrests or complaints; however, incidents involving officers who were assigned and activated their BWC were significantly more likely to result in an arrest and less likely to result in a complaint.

Conclusions

Future researchers should account for BWC activation to better estimate the effects of BWCs on officer behavior. To maximize the effects of BWCs, police agencies should ensure that officers are complying with activation policies.

中文翻译：

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穿戴式摄像机激活对单个事件结果的影响的随机对照试验

目标

评估随身摄像机（BWC）对军官发起的活动，逮捕，使用武力和投诉的影响。

方法

我们通过凤凰城警察局对436名警察进行的随机对照试验，使用工具变量分析来检查BWC分配和BWC激活对单个事件结果的影响。

结果

涉及激活《生物武器公约》的事件与由官员发起的接触和投诉的可能性较低，但与逮捕和使用武力的可能性较大。仅BWC的分配与逮捕或投诉无关；但是，涉及被指派并启动其《生物武器公约》的官员的事件明显更有可能导致逮捕，也不太可能引起投诉。

结论

未来的研究人员应该考虑BWC的激活，以更好地估计BWC对官员行为的影响。为了最大程度地发挥《生物武器公约》的作用，警察机构应确保警务人员遵守激活政策。