The document discusses the "Mr. Big" police interrogation technique where undercover officers pose as criminals to gain a suspect's confession. It summarizes that the technique circumvents protections against coercing unreliable confessions and obtaining evidence unfairly. Critics argue it allows police to sidestep safeguards and obtain confessions through any means without detaining suspects. False confessions are common results and can lead to wrongful convictions even when retracted. The document concludes that admitting such confessions as evidence at trial would violate the Canadian Charter of Rights and Freedoms.