Martinez, California is installing six surveillance cameras to monitor crime, joining neighboring cities Pinole, Pittsburg, and Brentwood in using cameras to track criminal activity. A study of surveillance cameras in San Francisco last year by Berkeley Law’s Samuelson Law, Technology & Public Policy Clinic has influenced their implementation in other jurisdictions. While San Francisco’s cameras had no discernible effect on homicides, drug dealing, prostitution, or vandalism, property crimes dropped significantly near camera locations. Martinez’s cameras will monitor high-crime public areas and feed live images to a police station computer screen so dispatchers can zoom in if they see something suspicious.