Last week, an article about preliminary 2010 crime data released by the FBI contained two errors concerning Baltimore's rankings. Though newspaper corrections are typically terse, I wanted to fully acknowledge and explain my mistakes, which came to light after seeing an article on The Atlantic's web site* about the rankings.
My article said that Baltimore had the fifth-highest murder rate, but it in fact had the fourth, surpassing Detroit by a slim margin. My own calculations showed this, but I failed to notice. Baltimore had a murder rate of 34.85, while Detroit's was 34.46. There's a disclaimer in here, though it doesn't excuse the mistake: The FBI used population figures that are different than the recently-released Census data. The FBI put Detroit's population at 899,447, while the 2010 Census had it much lower at 713,717. Baltimore's population was listed as 639,929, while the 2010 Census had it as 620,921. Using those new population figures, Baltimore goes back to No. 5 with a murder rate of 35.91, and Detroit's jumps to 43.43. But I'm not sure when or if those population differences will be reflected. So as far as this week's data goes, I erred.
I also wrote that Baltimore had the seventh-highest violent crime rate, when it actually had the eighth-highest. There were 233 cities to consider, and I had compiled a list of likely candidates from prior year lists and looked through the data for new additions. I left out Little Rock, Arkansas, which catapulted to the top 10, placing it between Oakland, Calif. and Baltimore. The Census vs. FBI population question doesn't affect Baltimore's place behind Little Rock.
The FBI, of course, cautions against ranking cities, because of a variety of factors that make them difficult to compare. Not among those warnings is weary reporters who misuse the data.
*While we're pointing out corrections, though, the Atlantic article also claims that Baltimore's crime mostly occurs in the "Front Street" neighborhood, "a world away from the new office towers of companies like financial giant T Rowe Price on Pratt Street." There is no Front Street neighborhood, and the street itself spans only a few blocks along The Fallsway between downtown and East Baltimore - hardly the worst area in the city. WBAL in 2009 also referred to the "Front Street neighborhood" - which was inexplicably placed in South Baltimore - when referring to a dubious ranking of most dangerous neighborhoods.