On the run" by Alice Goffman

In the book on the run" by Alice Goffman she refers to the community in Philadelphia where she did her fieldwork as "a fugitive community". What does the author mean in using this expression to describe this community? In order to answer this question you need to demonstrate just how the actions of the police directed at young black men creates a vicious cycle that permeates the entire community and influence the behavior of virtually all the people living there.