Overview
- On February 3, 2025, 15-year-old Harvey Willgoose was fatally stabbed in the courtyard of All Saints High School in Sheffield by fellow pupil Mohammed Umar Khan.
- Channel 4’s July 16, 2026 episode of Murder Case: Digital Detectives released forensic material that investigators used at trial, including CCTV, social-media exchanges, phone images and internet searches.
- Police reviewed roughly 125 cameras and about 500 hours of footage and examined Khan’s devices to find weapon selfies, blade-related searches and messages that prosecutors said showed months of escalation.
- A school-commissioned report and Harvey’s family say warning signs were missed before the killing, and the documentary has renewed calls for better school interventions and monitoring of online peer conflicts.
- The case highlights how digital footprints can both secure prosecutions by reconstructing motive and sequence and raise policy questions about prevention, school safety and how to spot online red flags early.