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The first sheriff station was established.
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Boston created a night watch in 1636 ,New York.
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The first formal slave patrol was formed.
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Modern police stations were established.
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In 1829, Peel established the Metropolitan Police Services in London. With the founding of London's police force, Peel became widely regarded by criminologists and historians alike as the father of modern policing. British police officers are still known affectionately as "Bobbies" in honor of his first name, Robert.
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Philadelphia created the first day watch.
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In 1838, the city of Boston established the first American police force, followed by New York City in 1845, Albany, NY and Chicago in 1851, New Orleans and Cincinnati in 1853, Philadelphia in 1855, and Newark, NJ and Baltimore in 1857
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First organized police force to work full time that was publicly funded and created in Boston.
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The London police were called bobbies, after Sir Robert Peel who advocated the creation of the Metropolitan Police Force in 1828. Copper as slang for policeman is first found in print in 1846, according to the Oxford English Dictionary.
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District stations were linked to headquarters by telegraph lines.
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the Pennsylvania State Police becomes the first state police agency.
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The first female deputy sheriff:Margaret Q Adams is hired by LA county sheriff's department.
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the lie detector was created.
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The fingerprint classification system was developed.
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Radio-equipped squad cars were first used.
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FBI inaugurated the forensic laboratory.
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Radar was introduced to traffic law enforcement.
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911 is created.
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The United States Association is formed when two other associations merge.
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CompStat,a crime tracker,is put in function.