How convenient, I just heard an interview with a police Col. from Rio de Janeiro, yes, they installed cameras following the British example, there are few right now but "soon" there should be over 300 cameras covering the entire coast of the city.
He considers these cameras as a mere accessory, he believes they can be usefull to spot and identify criminals and help direct the police response but he doesn't believe they can replace physical police activities for "prevention", there are no statistical studies yet to verify the results of this new surveillance, but given the scandalous bathing suits and even topless women at the beaches I would estimate the "voyeurism" rate is 10x higher than in the British system.
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