On The Criminal Justice System

While I finish up my reply to Mac Donald, you'll want to peruse some data from Human Rights Watch

Because the white population in the United States is slightly more than six times larger than the black population,61 and the rate of drug use is roughly comparable between the two, the number of white drug users is significantly higher than the number who are black. For example, according to the 2006 surveys conducted by the federal Substance Abuse and Mental Health Services Administration (SAMHSA), an estimated 111,774,000 people in the United States age 12 or older have used illicit drugs during their lifetime, of whom 82,587,000 are white and 12,477,000 are black.62 There are also far more whites than blacks among people who have used cocaine in any form in their lifetime, as well as among those who have used crack cocaine. According to the 2006 SAMHSA estimates, there are 27,083,000 whites who have used cocaine during their lifetime, compared to 2,618,000 blacks, and 5,553,000 whites who have used crack cocaine, compared to 1,536,000 blacks.63 If black and white drug users are combined (and leaving aside other races), blacks account for 13 percent of the total who—according to SAMSHA surveys—have ever used an illicit drug, 8 percent of those who have ever used cocaine, and 21 percent of those who have ever used crack cocaine.