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A look at new ways of catching criminals. Police and passers-by join forces to hunt down armed robbers in a busy high street, and there is a back-seat surprise for car thieves.

Police and passers-by join forces to hunt down armed robbers in a busy high street, and there is a back-seat surprise for car thieves.

First shown: 11.45am 24 Feb 2014 Expires today 8:20am Duration 29 mins

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