Harvey Willgoose, 15, was stabbed in the heart in front of horrified children by another student who had taken a hunting knife to school.

Sheffield Crown Court heard how other pupils fled “in fear and panic”, some locking themselves in a school cupboard, after the fatal attack at All Saints Catholic High School in Sheffield on February 3.

The defendant was found guilty of murder in August and will be sentenced on Wednesday by a judge, Mrs Justice Ellenbogen, who will also decide whether to lift his anonymity.

The jury in the boy’s trial was shown CCTV footage of the incident which showed how Harvey was stabbed twice.

One of these blows cut through one of his ribs and pierced his heart.

Jurors heard how immediately after the stabbing the defendant told All Saints’ headteacher Sean Pend

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