I'm late to this party, but I hope at least a few people will consider the contents of this study, on racial disparities not in terms of arrests but in sentencing.

I think it's a fair review. It notes that racial disparity is most evident in certain jurisdictions and absent in others.

From the summary, the key findings are:

• Young, black and Latino males (especially if unemployed) are subject to particularly harsh sentencing compared to other offender populations;

• Black and Latino defendants are disadvantaged compared to whites with regard to legal-process related factors such as the “trial penalty,” sentence reductions for substantial assistance, criminal history, pretrial detention, and type of attorney;

• Black defendants convicted of harming white victims suffer harsher penalties than blacks who commit crimes against other blacks or white defendants who harm whites;

• Black and Latino defendants tend to be sentenced more severely than comparably situated white defendants for less serious crimes, especially drug and property crimes.

The study shows that black defendants are more likely to have harsher sentences and that Latino defendants are more likely to be found guilty than their white counterparts.

I wasn't able to dig up any research on bystanders killed by police officers, but there is this independent research by a blogger. He basically looked at pictures of officers killed by other officers between 1960-2011. He looked specifically for victims of cop-on-cop violence, occurring from mistaken identity.

These are cases where police officers were gunned down by other police officers by mistake, in the field - basically misidentified as suspects.

About 40% of the officers killed by mistaken identity were black. About 10% of officers in general are black, though it's tough to tell if this is the right metric... still, not an encouraging statistic if we're supposed to be sold on the idea that police officers are racially/ethnically impartial.

As other commenters have pointed out, the enforcement of the drug war is a clear counterexample to the claim that law enforcement is truly colorblind. There are almost identical rates of drug use between whites and blacks, but blacks are incarcerated at far higher rates for drug-related crime. The Drug Policy Alliance has more, but obviously can't be considered as neutral as the Wikipedia link. I think there's something to be said, too, about the War on Drugs leading to cycles of incarceration and poverty, where young black children grow up with fathers in prison.

In any event, I think it's problematic that the hivemind was so quick to upvote without citations (at least in the original comment) or critical thought. I know we all want racism to be over, but I don't think the way we'll get there is by pretending the problem is over.

TL;DR: Not all the facts line up with the idea that law enforcement is colorblind.