Washington (AFP) – Ketanji Brown Jackson does not have the background typical of US Supreme Court judges. And not just because she’s an African-American woman. While many judges have made their mark as prosecutors, Jackson spent two years as a federal public defender representing indigent defendants. She has served on the US Sentencing Commission, an independent agency created by Congress in 1984 to address sentencing disparities. And Jackson has personal experience with the harsh sentences meted out for drug crimes in the United States — an uncle was sentenced to life in prison in 1989 for c…