Operation Dark Phone: Murder By Text

The inside story of a huge operation by the UK's National Crime Agency to hack global crime gangs' encrypted phone network, used by thousands of criminals to organise smuggling, murder and more.

UK authorities identified Jamie Rothwell as a dangerous kingpin plotting attacks; Dutch police unearthed plans for an underground torture chamber.

Matt Horne, NCA Gold Command, stresses that the operation's secrecy is crucial; fears arise when a leak is discovered; a gangland murder in Rotterdam linked to the torture chamber plot raises concerns.

Sixty days since the authorities first broke into the criminals' messages, the beginning of the end of the EncroChat hack approaches, as the owners of EncroChat become suspicious that they've been compromised.