A mum screamed in horror when she found out her son had been murdered at school by coming across a phone message reading "RIP Harvey". Harvey Willgoose, 15, was killed with a hunting knife by a fellow pupil at All Saints Catholic High School in Sheffield on February 3.

The killer, a 15-year-old who cannot be named because of his age, was found guilty of murder at Sheffield Crown Court on Friday (August 8). Harvey's mum, Caroline Willgoose, has spoken of the harrowing moment she first heard something had happened to her son.

She said her mother-in-law telephoned to tell her "something" had happened to Harvey. Mrs Willgoose then called her husband, Mark, who told her their son had been stabbed.

Moments later a police car pulled up outside the Willgooses' home and two officers asked Mrs Willgoose to go with them to the hospital.

Along with her older son, Lewis, Mrs Willgoose was driven to a children's hospital. She recalled telling Lewis that Harvey would not be going back to All Saints Catholic High School again. To which her older son replied: "Why? Do you think he's alright?"

Mrs Willgoose recalled answering: "Yes, of course he is."

After arriving at the hospital, the mother and son were taken to a room where they were asked to wait for the rest of Harvey's immediate family to arrive.

When Mrs Willgoose checked her phone, she then saw a devastating post which read: "RIP Harvey." She said: "And I just screamed. We were all just screaming."

She told the Mirror: "I was like, 'I saw him this morning,' and we all started screaming again. It was horrendous."

The trial heard Harvey and his killer fell out several days before the teenager's death, after taking opposite sides in a dispute between two other boys.

Prosecutors said the defendant had an "unhealthy" interest in weapons and had photos on his phone of him posing with other hunting-style knives and a machete.

The court heard he also "had a significant history of becoming angry and using violence at school".

Prosecutor Richard Thyne KC said the defendant had researched rage rooms and just over a week before the fatal stabbing had searched "waiting for someone to swing so I can let out my anger".

Jurors heard on the day of the stabbing, CCTV footage showed him trying to provoke Harvey, who remained "peaceful".

The court heard Harvey told his friends the defendant had been "acting like he had a knife" under his jumper in their science lesson that morning, but thought he was bluffing.

Jurors were told Harvey was happily chatting with his friends in a courtyard as the lunch break started when the defendant approached him.

One teenage witness said there was an altercation and the defendant punched and pushed Harvey, causing him to stumble backwards, before pulling out a knife and stabbing him.

Another girl who gave evidence said: "We went inside to go and tell a teacher, but the teacher was frozen as well. She didn't know what to do."

She said: "People were running, screaming everywhere. It was, like, chaos."

The defendant told the trial that suffering racist bullying and taunts about a medical condition meant he got angry quickly and "couldn't control it".

The boy told the jury his mother had mental health problems and his father, who hit him, was often not there. He told the court he took the knife to school because he thought he was going to get hurt that day.

He said Harvey looked angry when he brought up a previous dispute, and had one hand in his trousers, which made him think the schoolboy had a knife.

Gul Nawaz Hussain KC, defending, told jurors: "Tragically, Harvey was a combination of being the final straw that broke (the defendant) and the unintended face of a series of threats of violence and bullying he had suffered in recent months.

"We say he suffered a loss of control which resulted in horrific and tragic consequences."

Steve Davies, Chief Executive of St Clare Catholic Multi Academy Trust, said on Friday that Harvey's death was an unimaginable tragedy for all and one that gave rise to a number of questions from family and others.

He said: "Now the trial has finished, a number of investigations aimed at addressing and answering these questions will be able to proceed. We will engage fully and openly with them to help ensure every angle is considered and no key questions are left unresolved."

The Willgooses are campaigning for knife arches to be installed in schools to prevent another family from suffering the same ordeal they are going through.

Harvey's killer admitted manslaughter but denied murder, saying he "snapped" after a long period of bullying and does not remember what happened.

Mrs Willgoose has called for the boy to be named, telling the BBC that while her son's name had been "tarnished" during the trial, his killer cannot be identified.

Trial judge, Mrs Justice Ellenbogen, is due to decide on whether to lift the anonymity order when the boy is sentenced in October.