• 
New York Police Founded 1845 
• 
Chicago Police Founded 1855 
• 
Philadelphia Police Founded 1751 
• 
Jacksonville Police Founded 1822 
• 
Indianapolis Police Founded 1850’s 
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Detroit Police Founded 1865 
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Portland Police Founded 1870 
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Eugene Police Founded 1863 
• 
Jackson County, Oregon Police Founded 1852 
With the advent of the industrial revolution, came goods and services. Along with new job 
opportunities, came a myriad of conflict as well. The fast-growing cities had to answer these problems with 
solutions in the form of policing. The abolishment of slavery and the new free black population created 
many unforeseen issues too with The Klu Klux Klan. The Klan began to make terrifying appearances and 
their reign of terror left many in fear. Policing had not yet formally entered the scene; therefore, The Klan 
operated virtually unencumbered. 
Introduction to the American Criminal Justice System
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