How far may the Police go in tricking someone to "confess" to murder? Well, I can talk about what happens in Canada ... .
In the early 1990s, Police in British Columbia came up with a pretty novel way of trying to get information out of suspects who had refused to tell them the "truth" in formal interviews. It's since become known over there as the "Mr Big" technique. The CBC's website describes it as follows:
Here's how Mr Big works: