These are facts, perhaps, but not complete facts.
If you are not actually seeking a racist explanation for this, then perhaps you will be amenable to incorporating the additional facts that discrimination, poverty, and lack of economic opportunities work to push minorities into a life of crime.
When you grow up in the streets, you don't choose the life: The life chooses you.
And that, plus inherently more aggressive policing of minority neighborhoods necessarily lead to higher arrest and eventual incarceration rates.
And we're only talking violent crime now, but if you want to add non-violent (i.e. white collar) crime, I think richer/more privileged and generally whiter folk fall prey to that lifestyle more often.