Scientific report shows police body-cameras can prevent unacceptable use-of-force

In both police and civilians.

http://www.sciencedaily.com/releases/2014/12/141224103101.htm

Date: December 24, 2014
Source: University of Cambridge

Summary:
As Obama pledges investment in body-worn-camera technology for police officers, researchers say cameras induce 'self-awareness' that can prevent unacceptable uses-of-force seen to have tragic consequences in the US over the past year -- from New York to Ferguson -- but warn that cameras have implications for prosecution and data storage.