https://en.wikipedia.org/wiki/Mr._Big_%28police_procedure%29
Mr. Big (sometimes known as the "Canadian technique") is a covert investigation procedure used by undercover police to elicit confessions from suspects in cold cases (usually murder). Police officers create a fictitious criminal organization and then seduce the suspect into joining it. They build a "relationship" with the suspect, gain his confidence, and then enlist his help in a succession of criminal acts (e.g., credit card scams, selling guns). Once the suspect has become enmeshed in the criminal gang he is persuaded to divulge information about the specific crime under investigation.
The Mr. Big technique is invasive and persistent. State agents essentially infiltrate the target's life and alter its trajectory. Complete records of what took place are rarely available, especially how the target was singled out as a suspect in the first place. Most scenarios are documented by retrospective accounts recorded by operatives hours, or days after they took place. The operation involves the abuse of trust in personal relationships, and state-sponsored deception as a form of social control. Defense lawyers and criminal specialists have argued that the method is risky because it poses a risk of eliciting unreliable confessions. The dangers are spelled out in detail in the appended references.
Be careful.. beware of the 'supermobboss' gangster / kingpin and the delightful things they will offer you.
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