Richard from Dynamic50 has just released a ruby gem for the Police API available here: https://github.com/hookercookerman/oldbill. It allows you to hook into the new Police API service to find out about crime in your local area.
To get started, simply register for an API key here: http://policeapi2.rkh.co.uk/api/docs/signup/ and then add the gem to your Gemfile:
or you can just install it from the command line:
gem install oldbill
and then follow the instructions on the readme at https://github.com/hookercookerman/oldbill
The Police API allows you to download data about crime localised to your area within a date range, and is data direct from the UK police service. Enjoy!