Let's see if we can find an instance where this factor is falsified. We should not be able to find ANY instances where wealthier blacks have a higher crime rate than poorer whites. That would be impossible.
Why don't we start with the easiest data point -
the richest cluster of black households in the entire United States and see how crime plays out in that community. This brings us to Prince George's County, Maryland.
Wikipedia informs us "Prince George's County is the wealthiest African American-majority county in the United States." It also informs us that "As of 2006, the county reportedly contains the highest crime rate for the Washington Metro area, comparable to Baltimore" Let's drill down a bit and see what this
report is telling us: "In 2006, nearly 16 of every 100,000 citizens in Prince George's were murdered, up from 15 in 1990." Now, with a median household income in 2008 of $71,696 there should not exist any jurisdictions with a disproportionate white population, a lower median household income and a lower murder rate. The overall homicide rate in the US is 4.7 per 100,000. Unfortunately I can't find a Census table which let's me rank order the variables so I'm taking a random walk through the internet and I land on Lewiston, Maine. This town has a median household income of (2011) $37,102, about half of Prince George's County, and is
89.3% white and has a murder rate of
2.8 per 100,000,
nearly 1/6th the murder rate of the wealthiest black community in the United States.
No, economics doesn't explain away the higher murder rate.