While just shootings is at 400 (as you say), the City of Buffalo has a few other statistics from 2004 that might be of interest to the lose of police officers on the streets.
1,869 Violent Crime
32 Murder
113 Rape
672 Robbery
1,052 Agg. Assault
7,477 Property Crime
1,795 Burglary
4,439 Larceny
1,243 MV Theft
Comparable to Nassau County, New York:
797 Violent Crime
1 Murder
34 Rape
320 Robbery
442 Agg. Assault
7,052 Property Crime
1,123 Burglary
5,206 Larceny
723 MV Theft
I found this information HERE