This single, spontaneous, ill-considered outburst from De Voe was game-changing. Out of context, it meant nothing but, put together with everything else they knew, it could mean that Alberto strangled the man in the horsebox to the point of snapping his hyoid bone, before sliding him into the lake. And, if that proved to be true, then De Voe’s recorded outburst just proved that he knew about it. This could link all of the key players to the first murder. They were miles away from this recording being of any use in a court of law but in this squad room, it was invaluable. It gave them a possible name for the man in the horsebox: Angelo. As soon as she heard the recording, Bevan jumped on this lead without being asked, driven by a need to find justice for the dead man she’d linked to their case in the first instance.

This dramatic new angle was then almost trumped when Oaks announced he’d stumbled on another new name: Miguel Delgardo. He was an Argentinian in his late fifties who had spent time in a Brazilian prison for drug smuggling. He was a skilled criminal who had evaded capture for most of his career; and was only ever charged with a fraction of the crimes that the Brazilian criminal justice system brought against him, serving seven years of what should have been a life sentence. Delgardo was loosely connected to the Brazilian billionaire businessman, Luiz Barro, father to Betina and Alberto, but when Oaks couldn’t trace any recent communication between the two men, he decided to add Delgardo’s early-90s mugshot to a fourth ‘possible connection’ board and move on.

Jack was immediately drawn to this 20-year-old image. He wasn’t sure why at first. He studied it until his mind made sense of what was nagging at him, then Jack moved Delgardo’s image onto the ‘prime targets’ board, alongside the image of De Voe.

Oaks then asked the obvious question: ‘How come he’s a prime target when we don’t even know who he is?’

‘Look at the eyes.’ Jack’s smile worried Oaks, as it meant that there was something bloody obvious right in front of him and he had no clue what it was. The whole room was now focused on trying to see what Jack was seeing.

Bevan got there first.

‘It’s him!’ She was so excited that she couldn’t help shouting it out. ‘Michael De Voe is Miguel Delgardo!’