This is going to get buried but whatever, this is to OP more than anything. I am going to point this out because you seem to be missing a few pieces to your statistics. You said I quote "40% of all youths tried as adults and 58% of all youths sent to adult prisons. Black youths with no prior record were nine times as likely to be sent to prison as whites" Did you ever look as to why? This is crime data presented by the FBI. Notice here that about the same amount of black and white people are murdered every year, which is interesting but not my point. http://www2.fbi.gov/ucr/cius2009/offenses/expanded_information/data/shrtable_02.html

Now look at this table.http://www2.fbi.gov/ucr/cius2009/offenses/expanded_information/data/shrtable_03.html Murders by races are about the same in total, but take a look at african americans ages 22 and younger, and younger than 18. Do you see? You can postulate based on this evidence they are almost twice as likely as whites to commit murder in this age group which could help explain why there is such a high rate of incarceration of black youths.

On to my next point. So lets get another thing straight, the GRAVITY and intent and execution of a crime by a person/young adult are what determines if they will be tried as an adult. Take a look at this chart from the Department of Justice about SINGLE offenders. http://bjs.ojp.usdoj.gov/content/pub/pdf/cvus/current/cv0840.pdf. If african americans comprise 12.5 % of the american population but commit 30% of all first offense violent crime reported,and almost half of all robberies resulting in injury of the victim could explain why there are so many african american youths are incarcerated too. Also couple that with my previous data supported statement that african american youths are twice as likely to commit a murder would seem to indicate a high african american youth incarceration % is legitimate. So showing outrage for an entirely plausible situation is silly.