MEMPHIS, TN - Using the past to predict where crimes are going to happen in the future, it's the idea behind heat-mapping, a new part of the Memphis Police Department's Blue Crush. Before the crimes happen, MPD puts officers on the streets in hot spots to try to prevent them from happening.

Crime mapping has been around for a while, but Memphis Police are taking it's precision to a whole new level and putting it to work. So far, they say they've seen big results.

“We're operating on the theory that the past is the best predictor of the future,” said John Harvey with the MPD’s Real Time Crime Center.
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