"As for more Hawaiians in prison" -- In the last decennial Census, the median age of Native Hawaiians living in Hawaii was 26, while median age of everyone else was 42.  Crimes -- especially drug-related or violent crimes deserving prison, are committed by young people, not middle-aged people.  That's why NH are imprisoned more, and with longer sentences -- not because they are NH but because they have a 26 year age gap.  The sins of youth.  For a detailed analysis of the 2010 OHA report on criminal justice, see
http://tinyurl.com/3xxc5ja 
and, regarding the followup 2012 OHA report. see
http://www.angelfire.com/big09/DisparateTreatmentCriminal2012.html