Colin meets a witness – and a group of men bravely tell him what happened to them at school 40 years ago when they were boys, in the hope that what they know may help the investigation into Vishal’s disappearance...

If you have been affected by child sexual abuse, help and support is available at bbc.co.uk/actionline

Presented and investigated by Colin Campbell

Series written and produced by Satiyesh Manoharajah

Audio production, sound design and original music: Steve Urquhart

Executive Producer: Alistair Jackson

A BBC Studios Production