WGN recently did a very good story on surveillance cameras in the city.
Here is a snippet:
A spokesperson for the Cook County State's Attorney's office tells WGN-TV they can't identify a precise number of cases where cameras were utilized, though they have been helpful in some cases. Thanks to a million dollar grant, the Illinois Institute of Technology is working with the city to study the impact of cameras on crime. In the meantime, the technology is getting cheaper. The images are clearer. And by all accounts, surveillance cameras are here to stay. You can find much more by clicking these web extras and links.
Take a look at the site for the full story as well as additional interviews. I was interviewed for an hour by the reporters, so they really understood the issues and nuances around surveillance in Chicago. One positive outcome of this story is that the CPD has reached out to me over my concerns about transparency and lack of empirical data on the cameras. I plan on engaging with them.