The time has come to arrest Alisa’s brother, Staton Grubert. Thirty armed agents commando crawl up a dirt track to his trailer in Texas. Staton has no idea that his time is up. Will Alisa finally get closure?

And in a state in the South West, Greg is reunited with Lucy, the girl who had been abused for six years.

This podcast includes some upsetting scenes and discussions of child sexual abuse.

For further information on the issues raised in the programme, contact support organisations in your own country. For a list of organisations in the UK that can provide support go to bbc.co.uk/actionline.

Reporter and Presenter: Sam Piranty

The Darkest Web is a BBC Eye production for the BBC World Service.