Take down - a low-down

Law enforcement is driven by intelligence, with the temptation to leave informants and laundering operations running to maximise knowledge, but eventually the cost of doing so will outweigh the benefit. Keith Nuthallwent in search of the tipping point.

Law enforcement is driven by intelligence, with the temptation to leave informants and laundering operations running to maximise knowledge, but eventually the cost of doing so will outweigh the benefit. Keith Nuthallwent in search of the tipping point.