‘Cruel and calculating’ cage fighter killed his ex-partner after discovering his sexual relationship with a 15-year-old boy | UK News

A “cruel” cage fighter murdered his ex-partner after blackmailing her for a sexual relationship she had with a 15-year-old boy.

Newcastle Crown Court heard how jealous ex-con Paul Robson, 50, spied on 47-year-old teacher Caroline Kayll and the teenager outside their Northumberland home last November, then launched a terrifying and sustained attack on both of them. .

Branded a “cruel and calculating coward” by the prosecution, Robson kicked Ms. Kayll in the head while wearing heavy work boots, and may have strangled her.

In his rage, they told the court, he cut her hair into strands and cut her on the buttocks.

She was unable to survive the catastrophic brain injuries he inflicted on her.

The evidence was so heartbreaking that the presiding judge, Judge Lavender, said jurors would be excused from serving as a jury again for at least 10 years.

The court heard that Robson repeatedly attacked the boy with scissors and a butcher knife, doused them both with ammonia and stole their phones, then updated his social media, posing as her, while he fled.

She even texted one of her friends to say, “I went up there and they’re curled up on the couch, watching TV.”

Nicholas Lumley QC, accuser, said: “He was never going to do anything but screw it up.”

“If his anger and frustration took hold of him, he was going to take things further and end his life.”

The cage-fighting coach and former MMA fighter denied the murder, claiming it was the boy who attacked Ms. Kayll, and said he fought to beat the less powerful teenager in the fight that followed.

Robson had a clandestine relationship with Ms. Kayll while behind bars at HMP Northumberland.

They lived together, but separated weeks before the murder and he blackmailed her when he learned of the illegal relationship he had started with the teenager, who cannot be identified.

Mr. Lumley told the jury that Robson had her under control, saying, “He knew things about her that she would not want made public.”

She had to confide in a friend that Robson was blackmailing her for £ 35,000 and that her ex was “going to screw her up” and tell her school, the jury heard.

For 10 days in November, he transferred £ 29,000 to Robson and took out a loan of £ 10,500, having previously been creditworthy.

However, the money was not enough for him, and on November 15, Robson drove three hours from Glasgow to Linton, having bought a locksmith bar, a magnetic GPS car tracker, screwdrivers, pliers, a wrench and ammonia that decanted in a washing machine. -up bottle of liquid.

CCTV showed him “loitering” outside his home.

Witnesses heard a female voice yell “get out” and later that night Robson called his old neighbor’s home to say “Caroline was in a bad situation,” Lumley said.

He then fled to Glasgow and remained at large while police appealed to locate him before he was arrested.

He did not respond to detectives’ questions, but in a prepared statement said he was “broken” by his death and claimed that someone attacked him when he visited his home.

Robson fled for six days as his ex-partner’s life declined in hospital.

After the hearing, Detective Inspector Graeme Barr said the crime was one of the most violent he had seen in his career.

Robson will be sentenced Wednesday.