Maybe its because everyone went out and bought ammo.
Thereby driving the price of ammo up and because of the recession people can't afford to buy more ammo?
Homicides decline in S.A., Bexar County
Last year's homicide total in San Antonio dropped to 114, the lowest number since 2005 and a 17 percent decline from 2008 — a trend that mirrors the nation.
Ninety-nine of the homicides were classified as murder cases, 19 fewer than in 2008, according to San Antonio Express-News research and statistics from the Police Department.
The department's clearance rate for murder cases was 82 percent, a 5 percentage-point increase compared with 2008. The clearance rate is significant because it means an arrest was made or a suspect was identified.