It became the ultimate evidence that captured LeRouxs criminal intent to traffic in drugs and arms.
Actually, Diego is an informant too.
Its one of the best detective stories and crime stories Ive ever encountered, Mann tells EW.

Credit: William Morrow
And it only worked because the criminal had insulated himself from his associates.
They didnt know to miss him.
Nobody knew where LeRoux was at any one moment in time, ever, Mann says.
Mann developed the show from Shannons 1988 book about the killing.
Its a complicated story, spanning every continent but Antarctica, and many personalities, she says.
Sometimes writing is like painting but sometimes its like sculpting.
He helped me carve.
That vaulted it to becoming the first title from Michael Mann Books.
The reason why he was a ghost on the radar and undiscoverable is because there was no physical organization.
Hes not like a Cartel based in Guadalajara or the Juarez Cartel.
This story also presented a number of heroes, particularly 960 Group point men Eric Stouch and Tom Cindric.
They got to know each other on a Mid-Atlantic task force.
They are never off the job.
Instead, theyre focused and motivated by the psychological parrying of their job.
Call it playing chess with the Devil.
Whats unusual is the ego-drive he had towards audacious criminality, he says.
The sheer audacity of it is what appealed to him.
The money he made was just points on a scoreboard.
One of the upcoming projects, for instance, is a prequel toHeat, co-written withReed Farrel Coleman.
Nonetheless, he has hopes for takingHunting LeRouxfrom the page to the screen.