We focus on the part of the internet that most people don't know about.

It's called the dark web.

Undercover in the furthest corners of the dark web,

US special agents are on a mission to locate and rescue children from abuse.

Move in now.

Police!

From the BBC World Service, World of Secrets,

the darkest web follows their shocking investigations.

Listen on BBC.com or wherever you get to your BBC podcasts.

Before we begin, this episode refers to child sexual abuse.

It contains strong language, and language some listeners may find offensive.

After the family meeting with Sussex Police in June 2021, everyone feels despondent. I'm not quite

sure what to do now that all the new information I've discovered has been so comprehensively rejected.

The police told the family and me that the links to the men who were abusing at the boarding school

in Sussex are not a viable line of inquiry.

Partly because they believe that these men groomed boys in their care.

They had no need to adopt a child from the street

and there is no information or intelligence that suggests otherwise.

That seems pretty difficult to argue with.

If the police are saying there's absolutely nothing to show that any of these men took

children they didn't know in their car so therefore they don't think they could be involved

in Vishal's disappearance. But as our team continue to research here, my series producer

...