It's Not About Sentencing. Police Need to Make More Arrests.

Batman's computer predictions would make sure fewer bad guys get away.

Holy algorithm.

Photographer: 20th Century-Fox/Getty Images

In preparing for a White House conference this week, I’ve reviewed the recent data on the fight against crime. And it’s depressing. For example, the share of violent crimes in the U.S. for which arrests are made is shockingly low -- less than half in 2014, the FBI reports. For burglaries, the share was only 14 percent.

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