An anonymous reader writes: Incidents like the Michael Brown case have recently put police body-worn cameras into the public consciousness, but they're not a new idea to criminology experts. In fact, researchers at Cambridge began a study in 2012 using law enforcement in Rialto, California as a test bed. Their results are now in: "The experiment showed that evidence capture is just one output of body-worn video, and the technology is perhaps most effective at actually preventing escalation during police-public interactions: whether that's abusive behavior towards police or unnecessary use-of-force by police." The simple knowledge that both parties are being watched puts a damper on violence. "During the 12-month Rialto experiment, use-of-force by officers wearing cameras fell by 59% and reports against officers dropped by 87% against the previous year's figures." This was enough for the city of Rialto to decide it wants to move forward with body-worn cameras; hopefully the study will encourage other police departments as well.