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New research on the effects of Body-Worn Cameras on police in the USA:

my multi-agency study finds that BWCs lead to substantial decreases in the use of force, both against whites and minorities. Nationwide, they reduce police-involved homicides by 43%. Surprisingly, this study finds no evidence of an association between BWCs and de-policing. By examining social media usage data from Twitter as well as data on the Black Lives Matter (BLM) movement, I find that after BWC adoption, public opinion toward the police improves. These findings imply that BWCs can be an important tool for improving police accountability without sacrificing policing capabilities.

Facilitating Police Reform: Body Cameras, Use of Force, and Law Enforcement Outcomes

This is good! Less homicides! Less force! Improved public support for police!