Well, well someone is asking where is the evidence. An article from The Guardian, with many links:http://www.theguardian.com/us-news/2...ner?CMP=twt_gu

Citing Michael D White, an Arizona State University criminology professor:
Although advocates and critics have made numerous claims regarding body-worn cameras, there have been few balanced discussions of the benefits and problems associated with the technology and even fewer discussions of the empirical evidence supporting or refuting those claims...e. The overwhelming theme from this review is the lack of available research on the technology.