Brian asks a good question about the homicide trends in smaller municipalities in the Cincinnati metropolitan area. I don't know what's happened in places like Hamilton, Fairfield, Batavia, Newport, and others. But I was curious as to how other, roughly Cincinnati-sized cities in Ohio and surrounding states fared. Here's what I learned.
Columbus's homicide total dropped 24%, with 79 in 2007 and 104 in 2006.
Cleveland experienced its highest number of homicides in 12 years: 134 in 2007 and 119 in 2006.
Louisville homicides went up, with 67 in 2007 and 50 in 2006.
Pittsburgh recorded an increase in the number of homicides: 57 in 2007 and 39 in 2006 (for all of Allegheny County, in which the 'burgh is located: 2007--98; 2006--96).
Note that a more important measure of homicide trend would be the homicide rate (usually expressed in terms of homicides per 100,000 people); a city whose homicide total remained flat while its population decreased would experience an increase in the homicide rate.
I was unable to find the 2007 numbers for Indianapolis, Dayton, or Lexington, which I thought might be instructive. If you know those numbers (or even the trends), please post them in the comments with a link to the source. (And as always, please post any thoughts you may have on the topic in the comments!)