The Black crime rate in the US is approximately 8.1 times greater than the White crime rate.
It is about 36.8 times higher than the US Asian rate, which itself is 4.6 times lower than the White rate.
It is even 4 times higher than the US Amerindian and Polynesian (mostly Hawaiian) crime rates.
It is also 2.4 times higher than the extremely high Hispanic crime rate.
These rates are particularly disparate when one looks at such things as rape.
For instance, in 2005, Black criminals raped 37,460 White females, while between 0-10 (they don't even keep records below 10 rapes) Black females were raped by a White man.
There is also a suggestion that about 10,000 of those 37,000+ rapes were by groups of more than one Black male (gang rapes).