Geneva (AFP) – Growing use of body cameras by police has led to a dramatic fall in brutality, a top UN rights expert said Friday, but warned the technology could be a double-edged sword.

There have been increasing calls for police to wear body cameras following a spate of cases, especially in the United States, of police violence and killings of unarmed people caught on camera.

“It seems from some of the early studies that … up to 60 percent of the use of force (is) reduced when police wear body cameras,” UN Special Rapporteur Christof Heyns told a briefing.

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