Our experiment suggests that we should recalibrate our expectations of BWCs.
Law enforcement agencies (particularly in contexts similar to Washington, DC) that are considering adopting BWCs should not expect dramatic reductions in use of force or complaints, or other large-scale shifts in police behavior, solely from the deployment of this technology.
We would also temper expectations about (and suggest further research into) the evidentiary value of BWCs. The administrative court data we had access to has certain limitations, but preliminary analyses do not uncover any clear benefits.
That said, no single scientific study can provide all the answers to every question we might have about a program or policy. There may be effects our study was not designed to measure. We do not rule out that BWCs may affect a small number of incidents, too few to detect in an average estimate.