A police officer heard a "cry of anguish" as her colleague was repeatedly stabbed in the head, face and neck by a suspected flasher resisting arrest.

PC Ashley Bates told a jury she was left traumatised after being greeted by a "horrific" bloody scene as she went to PC Sean Quinn's aid during the alleged scissor attack by a naked Robert Jenner.

The two Kent force officers had gone to the 50-year-old's home in Maidstone on June 15 last year after a report that a man fitting his description had been seen running "completely naked" that evening through nearby Mote Park.

But when they arrived, an abusive and aggressive Jenner repeatedly refused to open his flat door at Albion Place, barricading it from the inside with an upturned sofa.

The door had to be forced and PAVA spray twice deployed before the officers, along with two more constables called to the property, were able to gain access to the hallway.

But it was after PC Quinn had followed Jenner into a kitchen and lounge area - with the door closing behind them - that the alleged murder bid was launched, Maidstone Crown Court heard.

Giving evidence today (December 4) on the second day of Jenner's trial, PC Bates described him as being "quite anti-police" in the five years she had known him.

Reliving the moment it is alleged he tried to kill her colleague, the officer became upset as she told the court: "I heard, and I'll never forget it, a cry of anguish.

"I couldn't tell who it was. Being an older lady and questioning my flexibility, I shouted to PC (Luke) Isaacs and PC (Sophie) Groves 'Go, go, go!' Something bad was going on inside that room."

Having described how they clambered over the settee to get into the room, PC Bates continued: "They (PC Quinn and Jenner) were on the floor. They seemed to be spooning one another, stomach to back.

"Mr Jenner was on the inside of PC Quinn. He had his back to PC Quinn's chest....PC Quinn wears black leather gloves and he had his hands over the top of Mr Jenner's hand.

"Poking up from the middle of those gloves and Mr Jenner's hand was a blade. I thought it was a blade.

"PC Quinn was on his left side and I looked down and his head was just covered in blood. There was a pool of blood just spilling out behind his head. It was horrific.

"PC Isaacs seemed to be in front of PC Quinn and Mr Jenner. PC Isaacs was saying to let go of the scissors and was trying to release the grip, Mr Jenner's grip.

"I got down to my knees and I used force and I hit the back of Mr Jenner's head, the bony part of his head, and just hit him as hard as I could to make him release those scissors, that blade."

PC Bates told the jury she struck as many as six blows before Jenner dropped the weapon, saying 'All right, all right.'

She then turned her attention back to PC Quinn, who she described as being "in a bad way" with a large gash across his forehead and a puncture wound to his right wrist.

Using a towel to stem the blood "dripping off" his wrist, PC Bates also applied "really hard" pressure to the head wound which was exposing his skull.

The court previously heard that the officer suffered as many as 23 wounds, with 19 to the face, head and neck and which had the potential to be fatal had a major artery been struck.

He was wearing a stab vest at the time and it is alleged that Jenner deliberately aimed the scissor blades at the unprotected areas of his body "in a bid to end PC Quinn's life", said prosecutor Daniel Stevenson.

Jenner, who has chosen not to attend his trial, denies attempted murder and the alternative, less serious offence of wounding with intent to cause grievous bodily harm.

It is his case that he acted in self-defence of what he believed to be an unlawful arrest or unlawful entry into his flat.

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‘Flasher’ accused of stabbing police officer with scissors while resisting arrest

During cross-examination by his lawyer Christopher Jeyes, PC Bates maintained that she and her colleagues had acted professionally that evening, and that forced entry and arrest were necessary.

Denying that they were all "annoyed and frustrated" at Jenner, she said that she had made the decision to arrest him based on her knowledge of him being "a high risk of harm sex offender" and her reasonable suspicion that he was the man who had been seen exposing himself in the park.

Furthermore, PC Bates said the door needed to be forced open due to his uncooperativeness and PAVA spray deployed to "debilitate" him.

"I was there to arrest him, to protect the people of Kent, particularly women and girls," she told the jury.

"Annoyed and frustrated? I don't think so. When I was pleading with him at the door to open it, that was not 'annoyed and frustrated'."

But PC Bates agreed with Mr Jeyes that although Jenner was being obstructive on their arrival, he was not violent towards them before the alleged murder bid.

The court heard the scissors used had a maximum blade length of 9cm, with smooth edges, and two bottle opener components, one resembling a hook.

But pathologist Dr Virginia Fitzpatrick-Swallow said the fact the blade tips were blunt indicated that more force would be required to penetrate the skin compared to the same injuries being caused by a sharp or pointed weapon.

PC Quinn's wounds - 19 above the neckline and four to his right arm - were described as having been inflicted with moderate to severe force.

The one straight across his forehead was described as "the most graphic".

It was large, down to the bone, likely to have been caused by the scissor blades being partially or fully open and "on the borderline" of moderate and severe force.

Dr Fitzpatrick-Swallow explained it could not be stated as severe force in pathological terms as the weapon had not penetrated or damaged the skull bone.

Two to his arm were "deep and penetrating" and may have been defensive injuries, with one caused by the bottle opener hook.

Asked about the potential consequences if a major artery or vein had been "nicked, severed or penetrated", the pathologist said such wounds occurring outside a hospital environment and without prompt medical intervention could prove fatal.

But she added that although no significant vessel injury had been caused to the constable, penetration of just a "couple of centimetres" was required to reach the jugular vein.

The court heard that although 23 injuries had been sustained, it did not mean there had been 23 separate blows as more than one wound at a time could have been caused in a single motion.

It was also said that in determining the degree of force used, factors such as movement of the parties involved or any clothing worn that was thicker than T-shirt material are not taken into account.

The trial continues.