
A 15-year-old boy told his headteacher “I’m not right in the head” after he fatally stabbed a fellow pupil in the heart with a hunting knife, a jury has been told.
Sheffield Crown Court was shown “shocking” footage of the stabbing incident at All Saints Catholic High School in Sheffield on February 3, which left 15-year-old Harvey Willgoose dead and other pupils fleeing “in fear and panic”.