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Body-worn cameras and arrest: Zooming in on disaggregated metrics and possible unintended consequences
Journal of Criminal Justice ( IF 5.009 ) Pub Date : 2021-05-26 , DOI: 10.1016/j.jcrimjus.2021.101819
William P. McCarty , Zhe Meng , Marc S. Buslik , Rafael Moreno

Purpose

This study sought to assess the effects of body-worn cameras (BWCs) on arrest in the Chicago Police Department (CPD). It builds on the small number of studies that have explored the BWC-arrest nexus through its focus on outcome measures disaggregated by initial arrest category to see if there is additional specificity to the relationship.

Methods

This study uses a quasi-experimental design and propensity score matching (PSM) to compare similar groups of spatial units — police patrol districts – in the CPD over a 30-month study period. It also uses multivariate methods to assess whether difference scores in various types of arrest changed significantly over time after the introduction of BWCs.

Results

The results showed that in the BWC districts, arrests for misdemeanor marijuana possession increased as time increased (i.e. the difference scores became less negative). This tendency did not appear in a control group of districts. For all other categories of arrest, change occurred at similar rates in the BWC- and control-districts.

Conclusion

An upward trend over time in arrests for marijuana possession after the introduction of BWCs could be an unintended consequence that may undermine benefits a department and community may gain from reductions in use of force and complaints.



中文翻译:

随身携带的相机和逮捕:放大分解的指标和可能的意外后果

目的

本研究旨在评估随身摄像机 (BWC) 对芝加哥警察局 (CPD) 逮捕的影响。它建立在少数研究的基础上,这些研究通过关注按初始逮捕类别分类的结果衡量标准来探索 BWC 与逮捕之间的关系,以查看这种关系是否存在额外的特异性。

方法

本研究使用准实验设计和倾向评分匹配 (PSM) 在 30 个月的研究期内比较 CPD 中类似的空间单位组 - 警察巡逻区。它还使用多变量方法来评估在引入 BWC 后,各种类型的逮捕的差异分数是否随时间发生显着变化。

结果

结果表明,在 BWC 地区,因持有轻罪大麻而被捕的人数随着时间的增加而增加(即差异分数变得不那么负)。这种趋势没有出现在一个控制组的地区。对于所有其他类别的逮捕,BWC 区和控制区的变化率相似。

结论

在引入 BWC 之后,因持有大麻而被捕的人数随着时间的推移呈上升趋势,这可能是一个意想不到的后果,可能会破坏部门和社区从减少使用武力和投诉中获得的好处。

更新日期:2021-07-27
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