A teacher was allegedly murdered by her cage fighter ex after he blackmailed her out of thousands of pounds over her relationship with a 15-year-old boy.
Former prisoner Paul Robson had met Caroline Kayll while she was a prison officer and teacher at HMP Northumberland and they began a “clandestine” relationship.
After his release, they lived together for a time at a house in Foxcover, Linton, Northumberland, until they split in the autumn of 2019, the court heard.
Jurors at Newcastle Crown Court heard Caroline, 47, who was also previously been a police officer and a social worker, began a sexual relationship with a 15-year-old boy, who cannot be identified for legal reasons.
It is alleged Robson got wind of that, “did not take it very well” and began blackmailing Caroline, with threats he would “ruin her” and reveal what she had been doing with the underage lad. She had paid him £29,000 by the time of her death, jurors heard.
Robson is said to have gone to Caroline’s home on a Sunday evening last November when she was present with the boy.
Prosecutors say the “well-built, powerful” mixed martial arts coach and cage fighter subjected her to a “vicious” attack, left her with severe injuries to her face and head, hacked off clumps of her hair, squirted ammonia on her and left her with a cut across her buttocks.
The teenager was repeatedly stabbed all over his body and was left with around 45 wounds, the court heard.
It is claimed Robson then sent emails and messages from Caroline’s accounts, revealing her relationship with the boy, as she lay fatally injured in hospital.
Robson denies murder, attempted murder and blackmail.
Nicholas Lumley QC, prosecuting, said it was on November 15 last year that Robson headed to the North East from Glasgow “to confront Caroline”, buying ammonia, screwdrivers, a pair of pliers and an adjustable wrench on his way.
Jurors were told he parked well away from her home and CCTV from a neighbour’s home captured him “prowling” around outside for a time.
Having got in the house, a neighbour heard a woman shouting “Get out”.
Mr Lumley said: “In the minutes which followed, Caroline and (the youth) were both viciously attacked.”
Afterwards, Robson knocked at the door of Brian and Barbara Lee, next door.
Mr Lumley said: “He said that he had done something, that Caroline was in a bad way.
Giving evidence, Barbara said: “There was blood and hair everywhere.
“I could see Caroline lying face down on the floor.
“She was not breathing.
“Her clothes were ripped. Her leggings were pulled down to her knees, her briefs were intact.
“She had a cut across her bottom.”
Barbara said she became aware of a “young child” in the kitchen who was “staggering all over the place, bleeding profusely”.
She added: “I could see he had wounds, there was blood all down his face, he was very anxious, nervous.
“He was vomiting blood outside.”
Jurors were shown some “disturbing” footage from the cameras worn on the chests of the police officers.
The youth was seen covered in blood in the garden. He told police he had been stabbed “all over”, including in the head, arms, legs and chest.
Caroline was lying critically injured inside on the floor.
Referring to the youth’s account of what happened, Mr Lumley said: “(The youth) was upstairs, Caroline downstairs, when he heard someone banging. She must have opened the door and he could hear noises.
“The next thing he knew, a man came upstairs, obviously Paul Robson but he did not know that.
“He came into the room, with scissors and was on his back, bigger and heavier than him, pushing him down with one hand, he stabbed him in the back with the other.
“Robson got up and said “wait there, don’t move or I’ll kill you” and then he left, quickly returning with a large kitchen knife, which (the youth) recognised as coming from the kitchen drawer.
“He struggled this time, but he received more injuries to his arms and hands.
“Paul Robson told him to go downstairs. (The youth) was covered in blood and went to the sink to wash off blood.
“He then saw Paul Robson cutting off Caroline’s hair. Caroline was lying face down.”
The youth said Robson then went to a kitchen drawer and took out a meat cleaver and struck him over the head with it twice, causing him to slump to the floor.
He said Robson then fetched the garden hose and sprayed it on Caroline’s face.
Mr Lumley added: “Paul Robson took up the bottle of ammonia and squirted it at both Caroline and the youth, in his face.
A post mortem revealed many injuries to Caroline’s head and face, which had been subjected to “many forceful blows”, with multiple facial fractures
Bruising on the neck, allied with little bleeds on the inside of her eyelids, could be explained by strangulation.
There was bleeding over the brain, between the skull and the brain. The severity of damage to the brain was consistent with having been caused by forceful stamps or kicks, the court heard.
The youth had 45 wounds, mainly to the head, but also to the chest, back, arms and legs.
The court heard Robson took the phones of Caroline and the youth.
Mr Lumley said: “As we shall see, as well as prying on Caroline, he was to change the password on the phones.
“He accessed her Facebook account, he disseminated messages via her Facebook account, making reference to Caroline being in a relationship with (the youth).
“He fired off messages to Caroline’s contacts, her friends, her headteacher: telling them what she had been up to with (the youth).
“In similar terms, on the 16th November, he used Caroline’s email account to send an email to her former husband.
“All of this at a time when she was barely alive in intensive care at RVI.”
Mr Lumley told jurors Robson was experienced in MMA (mixed martial arts) and cage fighting and he trained others.
The prosecutor said: “There is nothing wrong with being physically fit, nothing illegal about MMA but his sporting prowess and his strength, on which he had worked for many years, maybe relevant when you come to consider any issues raised in this case.”
The court heard Robson, 49, of Stanley Street, Howdon, Wallsend, who denies all charges, may say it was not him who killed Caroline, that he hurt the youth in self-defence and that the transfers of money were legitimate.
The trial is expected to continue for several days.
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