In June 2023, Barnaby Webber, Grace O'Malley-Kumar and Ian Coates were stabbed to death by Valdo Calocane. Reporter Navtej Johal investigates his history of mental ill health, the care he received in the three years before the Nottingham attacks and asks what lessons can be learned.

• BBC
• Navtej Johal
• Celeste Calocane
• Elias Calocane