Four people recount their involvement with “county lines” - gangs that exploit children and vulnerable adults to sell drugs around the UK.

Underneath their stories lies a series of unspoken, unanswered questions. Who gets to decide the boundary between criminal and victim? Why do we view 'county lines' through the lens of crime and punishment? And how well does the system support individuals and families devastated by the impact of 'county lines'?

With thanks to St Giles Trust SOS Project, Not In Our Community, Escape Line and Eski Media

Produced by Phoebe McIndoe and Redzi Bernard A Falling Tree production for BBC Radio Four