Given that the vast majority of violence is white-on-white or black-on-black, are you seriously suggesting that the police are spending _more_ of their time and resources investigating murders of blacks than of whites?
The vast majority of the unsolved murders are inner-city, where often the police don't care who kills whom. The vast majority of the murders in the suburbs, in otherwise peaceful neighborhoods, get tons of police attention.
So no, I think it is is exceedingly unlikely that the actual homicide rate skews more white than the statistics show.
What would be interesting to see is the rate at which charged persons of certain socioeconomic tiers successfully defended their case, or were able to plead down to a lesser charge if they were originally charged with homicide.
It's true that more black people live in poverty than white people per capita, but it's also true that crime is not evenly distributed across all people per capita, and has a connection with poverty level. My point is that there are more white people living in poverty, and they commit crimes at lower rates per capita and also total than black people.
I don't have data for all of these arguments handy, but here's one resource on poverty levels by race and region: http://kff.org/other/state-indicator/poverty-rate-by-raceeth...
Also note that controlling for poverty does not eliminate the effect where blacks commit more crime than whites:
http://www.udel.edu/soc/faculty/parker/SOCI836_S08_files/McN...
> > As a means to assess these possibilities, I estimate separate regression equations for the black and white block groups in Atlanta. [...] Consistent with previous research, percent black retains a strong, significant effect on violent crime net of the effects of other controls. [...] Although this finding appears to provide partial support for the racial invariance assumption, the fact remains that for a large proportion of the black neighborhoods, the effect of disadvantage on violence is weaker than is the effect evident among all of the white neighborhoods in the analysis
We could speculate that lots of things might be true, but if we're going to approach this topic scientifically, we should analyze data that we have, and not simply posit hypothetical after hypothetical. E.g. speculation like: "maybe all the unsolved murders are committed by whites"or "maybe white defendants are getting off when blacks aren't" -- a fine train of thought to explore and validate with data, but it's just speculation unless/until there are data and evidence to back it up.
To expect equal outcomes is absurd. The black and white communities in the US have very different histories and cultures. Their economic conditions are also wildly different. The different crime rates and outcomes are completely consistent with this.
And yes, for some crimes, blacks probably get caught at a higher rate. Black neighborhoods tend to be high-crime areas, so they tend to have greater police presence. This is totally rational policing. Liberty City in Miami needs a strong police presence to protect the inhabitants. The super ritzy and quiet parts of Coral Gables don't. Guess where you're more likely to get picked up for a low level stuff like speeding, smoking weed, or loitering? And who's more likely to get caught? The white guy selling drugs to his buddies at school or from home, or the black guy selling drugs on the corner? Different communities, different dynamics, different outcomes.