While cameras are arguably effective at deterring robberies and non-fatal assaults, it is not clear that they reduce the incidence of homicide. A statistical analysis of workplace homicide data published February 27, 2002 in the Journal of the American Medical Association found that security cameras are among the least effective homicide prevention measures. The study suggests that the best approach is to adopt five or more crime prevention measures simultaneously. The same study assigned a high preventive value to barriers between workers and the public.
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