An innovative analysis by Eric Cadora highlights "million-dollar blocks" — individual city blocks where more than one million dollars per block per year are spent to incarcerate individuals from that block. Some blocks cost over five million dollars per year…A million dollars, coincidentally, is roughly what it would cost to pay for one patrol officer, twenty-four hours a day, every day for one year.
That is from Peter Moskos’s Cop in the Hood: My Year Spent Policing Baltimore’s Eastern District. In Brooklyn of 2003, there were 35 million dollar blocks. Here is more information, plus maps and graphs.