I heard about this in a magazine, and after visiting, thought it would be rude not to share!
If you are a crime writer, this man would happily advise you on police procedure. I have been too timid, not wanting to be branded a criminal myself. But this is wonderful, I have the protection of a computer screen.
Also, he has put posts up about policing. So a search may be all you need! Here is the address:
http://crimewritingsolutions.wordpress.com/I hope others will find this useful.