I'm curious how the new study involved 40x more officers than the Rialto study, but only collected 5x more hours of video. Were the Washington officers using the cameras a tenth as much? The article goes on to say that in Washington they collect about 1,000 hours of footage a day, but previously they say the study involves over 2,000 officers, so this sounds like fairly low usage. It says researchers checked to make sure they were turning on the cameras "when they were supposed to" and "found a high level of compliance". Curious.
