10. Police techniques.

Only specialized investigative techniques which would result in demonstrable harm to the public body that is the recipient of the request are exempt.  5 ILCS 140/7(1)(d)(v).  Generic police techniques are open. Id; Public Access Opinion 11-002(available at http://foia.ilattorneygeneral.net/pdf/opinions/2011/11-002.pdf) (number of police officers assigned to districts is subject to disclosure).