New Orleans, where population declined dramatically after 2005s Hurricane Katrina, showed a jump in the murder rate, which rose from 162 in 2006 to 209 in 2007, the report found.

报告称，去年新奥尔良的凶杀率大幅增长，从2006年的162起增长至209起。在经历了2005年的卡特里娜飓风后，新奥尔良市的人口大幅减少。

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Scharf said the widespread notion that Hurricane Katrina somehow caused the murder rate to spike in New Orleans is not the full story.

CNN: Names of victims fill church's 'murder board'

Like many cities across the United States, New Orleans' murder rate peaked in the late 1980s and early 1990s.

CNN: Names of victims fill church's 'murder board'

In other cases, we relied on expert opinion, like in linking New Orleans' leading murder rate to its illicit drug trade.

FORBES: In Pictures: America's Illegal Drug Capitals