Body cameras aren’t new, but since the spate of high-profile violent encounters between police and unarmed citizens — Michael Brown, Chris Lollie, Eric Garner, Marlene Pinnockand others — they’ve been at the center of our debate about how to reduce these types of incidents. Police in Washington and New York City have instituted body-camera pilot programs, Maryland Gov. Larry Hogan signed a law last month enabling their use in his state and Sen. Tim Scott is making a push for body-camera funding in Congress. These efforts can be effective, but they’re not a cure-all. Here are five myths about the power of body cams.