She's never seen anything like this before.

Yeah, it was like shocking.

I think for me, maybe it was a first, I would say, in the amount of victims, their vulnerability, their young age.

Absolutely horrific, yeah.

It was boys and girls.

It was both, yeah.

So whenever we noticed that an offender has access to multiple children, especially like the staggering numbers we were seeing in ***, for example, this case always gets prioritised.

It has to become, yeah, the top of the pile because as long as we don't arrest him, he's going to make new victims, that's for sure.

News of the takeover has to stay out of the media at all costs to avoid tipping off other criminals.

All I knew is that something was happening with that board, but I didn't know who, I didn't know what.

These cases, they have to be kept very tight, very secure.

In Interpol, I don't really...

We didn't have a role to play at that stage of the operation.

Our role came afterwards with supporting the victim identification efforts out of the operation.

Before that, we don't need to be involved, we don't need to know.

Do you think it's morally right that law enforcement takes over and runs these boards?

It gives Adele a front row seat to how producer forums incentivise the creation of even more disturbing material.

In general, to be part of a producer lounge or producer group, you have to prove that yourself have current access to a child by posting certain pictures with certain requests that are asked to you by the moderators or the admin of this group.

You have to prove that you're not just branding material as yours, but that you are actually a producer and it's a way also for them to protect themselves.

because they probably have a lot to lose by sharing this material.

They could get caught.

But only sharing it with other producers, I mean, you share it with people that have as much to lose as yourself.

Is it a competitive arena? Do they compete with each other?

Do they compete with each other? In some producer groups, you have levels.

The head of the unit boots up her computer.

And I remember she showed me one of the ongoing cases at the time.

And that was really my first, I would say, exposure to a child abuse video.

And yeah, I will never forget it.

It was a German case.

It was the only clue they had at the time.

It was German.

And as Adele Desir learns the ropes of her new job over at Interpol, she's seeing day after day how perpetrators are helping each other fly under the radar.