Body cameras were supposed to bring greater transparency to law enforcement. The case of Ronald Greene suggests police departments are still learning how to use, and even abuse, a new tool.

Today’s show was produced by Hady Mawajdeh, edited by Matt Collette, engineered by Efim Shapiro, fact-checked by Laura Bullard and hosted by Sean Rameswaram.

Transcript at vox.com/todayexplained

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