Here are five proven, data-based changes that could make a difference, and two approaches that don't seem to work, according to Campaign Zero. Track complaints about officers' use of forceMost complaints against officers aren't public, making them hard to track. These changes, along with requiring departments to report and publish online data on all uses of force, could reduce police violence. Body cameras are another method that haven't been proven effective when it comes to excessive force instances. Research has even shown that 93% of prosecutors' offices have used body cameras mostly in cases against citizens, not against police.

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