You realize that there's a selection bias there, and it's well-demonstrated by the statistics on drug use across different ethnic groups versus drug incarceration across different ethnic groups.
"Black people comprise 13 percent of the U.S.
population, and are consistently documented by the
U.S. government to use drugs at similar rates to
people of other races. But Black people comprise 30
percent of those arrested for drug law violations –
and nearly 40 percent of those incarcerated in state or
federal prison for drug law violations."
Statistics from:
9 U.S. Census Bureau, Quick Facts (2014)
http://quickfacts.census.gov/qfd/states/00000.html.
10 Substance Abuse and Mental Health Services Administration,
"Results from the 2013 National Survey on Drug Use and Health,"
Table 1.19B.
11 Federal Bureau of Investigation, "Crime in the United States, 2013,"
Table 43.
12 Bureau of Justice Statistics, Federal Justice Statistics Program;
Carson, "Prisoners in 2013," Table 14.