Via Travis H.
Saw this link above (link) the one you posted and thought I'd crunch some numbers myself. While the foreign population rose 2% from 2008-2009, "violent" crime rose 18%. Robbery was the big one, almost doubling from 133 to 260. To put that in perspective, .03% of foreigners committed a robbery. Furthermore, 0.22% of foreigners are thieves. "Other" crimes (not specified) rose 8%. It is interesting they did not break those numbers down further, since the 5,551 crimes not specified represent more than 2/3 the total 7,812 crimes committed (speeding tickets anyone???).
Overall, 0.89% of foreigners committed a crime (notice the decimal points on these percentages), giving a "criminal" rate of less than 1 per 100,000. That number would drop further given that one "crime" does not equal one person, one person likely committed several crimes.
The FBI considers "violent" crime to be murder, forcible rape, robbery and aggravated assault. But no figures for murder or rape were cited, though those two terms were cited in the second line of the article. Theft is a property crime.
Just for reference (not to be compared to my "criminal" rates, which account for number of criminals per foreigner) the US crime rate in 2008 for all crimes (violent and property) was 3,672 per 100,000. Violent crimes were 454 per 100,000.
The US murder rate was 5.4 per 100,000, between Turkey and Kenya. South Korea was 2.8 between Switzerland and Finland.