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  The New York City sheriff’s office was founded
 - 
  
  The town of Boston began the first night watch
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  The Boston police
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  The New York police
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  1886
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  1900
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  1920
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  1930
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  1940
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  1950
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  2000
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  2000
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  2002
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  2003
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  2004
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  2005
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  2006
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  2007
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  2008
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  2009
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  2010