See: http://www.city-data.com/crime/crime-Philadelphia-Pennsylvan...
Every day Philadelphia has about: 1 murder, 2 rapes, 25 robberies, 25 assaults, 35 burglaries, 110 thefts, and 20 stolen cars.
The active police + prison budget seems to be about $850 million. That's about $570 per person to keep 1.5 million people safe in one of the poorest major cities in the country.