"There was an agreement between the bookies and the players that in a certain over they would give away a minimum amount of runs, " Neeraj Kumar, the chief commissioner of Delhi Police, told a news conference Thursday.

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"Over time we are finding that sophistication is improving and the costs are going down, " said Bill Bratton, a consultant who also served as chief of police in Los Angeles and commissioner of Boston and New York City's police departments.

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Mr. Bratton, a former police commissioner in Boston and New York, and a former chief of police in Los Angeles, is CEO of the Bratton Group.

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