Sylvester M. Johnson is a retired American law enforcement officer. He served on the Philadelphia Police Department for forty-three years, including six years as the city's 13th Police Commissioner from January 4, 2002, until January 7, 2008.Johnson joined the Philadelphia police department in 1964 and was soon assigned to the city's High Patrol. In 1972 Johnson was awarded the medal of valor, the police department's highest award, for stopping the armed robbery of a supermarket in Cheltenham, Pennsylvania, while off-duty. Wikipedia
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