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Stony-faced serial killer Joanna Dennehy bragged about her killing spree to an alleged accomplice by glibly remarking: “Oops, I did it again.”

A court heard of the chilling admission along with two terrifying accounts of men who survived separate knife attacks by evil Dennehy.

During one of the bloodthirsty assaults, Dennehy told her petrified victim, “I’m going to f***ing kill you” as she repeatedly stabbed him.

A friend of hers also claimed how Dennehy had boasted about killing a total of eight people.

It came to light during the trial of Gary Stretch, 47, and Leslie Layton, 37, who are accused of helping Dennehy, 31.

The twisted mother-of-two has already admitted murdering John Chapman, 56, Lukasz Slaboszewski, 31, and her landlord Kevin Lee, 49.

She stabbed the three men in the heart and dumped their bodies in ditches in Cambridgeshire in late March last year.

However, a retired firefighter told Cambridge crown court how he almost became another victim when she launched an attack on him days later in April.

Robin Bereza told the jury how he had taken his dog for a walk near his home in Hereford when he was targeted at random by Dennehy.

He recalled how a car pulled up behind him and he was stabbed twice.

He added: “I saw the lady with something in her hands. I got worried then, frightened. I said, ‘What are you doing?’

“She said, ‘I want to hurt you. I’m going to f***ing kill you’.”

(Image: PA)

The husband and father, 68, explained how Dennehy seemed calm throughout the attack, showing no emotion.

He added: “She appeared to stare right through me.”

He remembered seeing a man in the passenger seat of a green Vauxhall Astra gesture to Dennehy to “get the hell out of there”.

Prosecutors said it was “miraculous” Mr Bereza survived and was able to walk home to raise the alarm before being rushed to hospital by air ambulance.

John Rogers described how he also survived a similar attack where he was stabbed repeatedly in the back and the chest while walking his dog, also in Hereford on the same day.

Recalling his assailant’s expression, the 56-year-old said: “She was very matter-of-fact about it all, as if it was something she had to do.

"She didn’t seem to be showing any emotion at all.

“She didn’t seem that she was enjoying herself, she was just going about her business.”

Peter Wright QC, prosecuting, described how Mr Rodgers had asked Dennehy: “What is all this about?”

To which she replied that she could see the stricken man was bleeding and that she had “better do some more”.

Mr Rogers eventually fell to the ground and recalled little other details except that the woman left and stole his dog.

He added: “As I lay there I thought, ‘This is where I am going to die’.”

He was found by a passerby who raised the alarm and a seriously injured Mr Rogers was rushed to hospital where he received specialist treatment to save his life.

The court also heard Georgina Page, a friend of Dennehy’s, describe how the killer turned up at her home in King’s Lynn, Norfolk, along with 7ft 3ins Stretch after her killing spree.

When she asked, “What have you done now you mad cow?”

Dennehy – sipping from a bottle of Jack Daniel’s – calmly confessed to killing three men and being on the run from the police.

The jury then heard how Stretch boasted to Miss Page of hiding the bodies in a ditch, saying: “I found a place where no one will find them.”

Miss Page went on: “All in all, Jo told me she had killed eight people.”

She also revealed that Dennehy had told her how she stabbed one man to death simply because he was “staring at her”.

She also boasted to Miss Page about how she had called Stretch to tell him she had killed the first two men, informing him, “Oops, I did it again”.

In response, Stretch had said: “I know what you mean.”

More disturbing details surrounding the case were also revealed in court , including how Dennehy claimed she had dressed one of her victims up in her black sequined dress and made attempts to “make it look like a sexual act”.

Dennehy and Stretch also told Miss Page they had hidden at least one body in a wheelie bin, but that Mr Lee had discovered it.

Miss Page said: “Jo said when Kevin Lee came back he opened up the bin and saw the body – so she had to kill him.”

They covered another body with bleach before leaving it, which Stretch said made the skin look “cracked”.

Miss Page added: “They reckon it was like something out of a horror movie and Stretch said the smell of the bleach made his eyes sting.”

Court had to be adjourned in the afternoon after Stretch broke a chair in the dock after trying to sit on it.

He injured his back and had to receive medical attention from paramedics.

Stretch, of Peterborough, Cambs, has denied three counts of preventing the lawful and decent burial of a body and two of attempted murder.

Layton, also of Peterborough, denies two counts of preventing the lawful and decent burial of a body and one of perverting the course of justice.

The trial continues.