Objectives

This study tests whether (1) shots fired calls for service in the gunshot detection technology (GDT) target area are more likely to be classified as unfounded; (2) police responses to shootings in the GDT target area are more likely to recover ballistic evidence or firearms; and (3) shootings in the GDT target area are more likely to be cleared.

Methods

Entropy balancing created a weighted control group that equaled the treatment group across a range of covariates. GDT effect was tested through logistic regression models with entropy balancing weights set as probability weights.

Results

Shots fired occurring in the GDT target area were 15% more likely to be classified as unfounded compared to control cases. GDT did not significantly influence the likelihood of evidence collection or case clearance in shooting incidents.

Conclusions

GDT may not add investigative value to police responses to shooting incidents and may increase patrol workload.

中文翻译：

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密苏里州堪萨斯城枪击侦查技术对证据收集和案件侦破的影响

目标

本研究测试 (1) 在枪击检测技术 (GDT) 目标区域内发出的枪击请求是否更有可能被归类为毫无根据；(2) 警方对GDT目标区域枪击事件的反应更有可能找到弹道证据或枪支；(3)GDT目标区域内的枪击事件更容易被清除。

方法

熵平衡创建了一个加权对照组，该对照组在一系列协变量上等于治疗组。通过设置熵平衡权重作为概率权重的逻辑回归模型来测试GDT效果。

结果

与对照案例相比，在 GDT 目标区域发生的枪击事件被分类为毫无根据的可能性高出 15%。GDT 并没有显着影响枪击事件中证据收集或案件结案的可能性。

结论

GDT 可能不会增加警方对枪击事件的调查价值，并且可能会增加巡逻工作量。