Submission + - Police use WhatsApp for surveillance operations, share intel with civilian.
When confronted by Computer Sweden (article in Swedish) the officer responsible for setting up the group say "I know this server is not located in Sweden and that one cannot share every kind of information" Yet it took less than an hour from that the group were set up that the teacher started getting sensitive intel on suspects. The only mobile chat medium approved for sensitive information is Blackberry, and this initiative by a small group of officers happened as they do not have access to Blackberry handsets which are considered too expensive.
Article in English