Let's stick with drug possession. Up until 2007, first time conviction on possession of 5 grams of crack cocaine, a drug supposedly used predominantly by blacks (supposedly, but not really), would result in a mandatory sentencing of 5 years [1]. If you were lucky and got caught with powder cocaine instead, you would have to have 500 grams in your possession to suffer a similar fate. This was the 100 to 1 sentencing disparity that was reduced to 18:1 in 2010 [2].
That's not all. Roughly 80% of those convicted for possession of crack cocaine are black, only 10% are white [3][4]. Yet crack cocaine usage within both races is about the same [5].
If you analyse conviction rates vs use for different classes (rich vs poor), I bet you'll find similarly outrageous numbers.