Not all blacks are criminals just most criminals are blacks.
not all racists are bbit, but all bbit's are racist
It tastes like racism, but it's really not. At least in the US, the statistics back that up. So, at the very least, most criminals
that get caught are indeed black or some other "minority." Blacks make up a disproportionate amount of the prison population (which in itself is disproportionate from the rest of the world) in the US. So while on the surface it seems racist, it's just (sad) fact.
But the problem doesn't lie in the fact that they're black. The problem lies in the fact of what they've been convicted of. Something like 70% (a number I remember from somewhere, it may be inaccurate) of the prison population is in for non-violent drug offenses. Another good chunk are in for drug-related violent offenses, such as robberies to support a habit, or defending one's "turf" from rival drug dealers.
The vast majority of American blacks and other "minorities" are below the poverty line. Poor (state-provided) education, minimum wage laws, and licensing requirements act to prevent most legal avenues to self-improvement from this poverty condition. The high prices of drugs make it a lucrative career, and one of the few open with little or no barriers to entry for an undereducated, impoverished "minority". So is it any surprise that these people flock to this career?
The other side of the coin is that the police are quick to assume the guilt of someone with a higher melanin count over someone with less pigmentation in their skin. So on the one side they have the lure of enough money to never worry about anything ever again, and on the other side, they have the police breathing down their necks. Enough get through this gauntlet and rise to riches to encourage the rest that it's a viable path. Most, however, don't, and end up inflating that already gigantic prison population.
When you count in the fact that most US prisons are run by private corporations with government-granted monopolies and responsibility only to their shareholders, the overall picture that paints is disturbing, to say the least.