What are the rates of incarceration for American Indians compared to Whites? or, What is the chance that as an American Indian you will be incarcerated in your lifetime? (Need source as well. The information I'm finding on the internet is mostly unsourced or refers to a mother jones article that I can't find.)
"Hunger and Homelessness Survey" is a report from the 2007 Conference of U.S. Mayors. It gives some statistics on various cities. Information regarding Philadelphia is on page 34.