The police are set up in such a way that they are much better at going after some types of crime (drug dealing, mugging) than they are after some other types of crime (stealing money from pension funds, failure to pay for overtime work, being a hedge fund manager, etc). So crimes that white people are more likely to commit are the crimes that the police are not equipped to handle.
Related to that - I have a social worker relative who told me that child abuse rates are the same across all the different demographic groups - rich, poor, white, black, etc. But disproportionately, the poor and the black are much more likely to come to the attention of authorities - the whiter and richer you are, the less likely you are even to show up on the statistics.