A SERIAL killer-obsessed attacker had diaries with detailed sexual fantasies and entries stating women "did not like him".

Anthony Roberts, 56, of Amber Heights in Worcester, admitted to assault by penetration, attempted murder and possession of a bladed article at Worcester Crown Court.

His attack has been called "among the most depraved and ferocious attacks" a prosecutor has seen in their 20 years at CPS.

Roberts charged at a pensioner who was walking home on Kleve Walk before stabbing her multiple times and threatening to kill her if she did not let him rape her at 2am on May 7.

He then bit the woman on the chest and sexually assaulted her as she tried to dial 999 and fight him off.

The 71-year-old victim suffered more than 50 stab wounds including serious injuries to her face, neck, chest, back, abdomen and legs.

Witnesses immediately called for help and when West Mercia Police officers arrived at the scene, they found a topless Roberts covered in blood and attempting to flee the scene.

READ MORE: Anthony Roberts obsessed with Jack the Ripper

Following a rapid investigation that included a search of his property, diaries that detailed sexual fantasies and entries stating that women “did not like [Roberts]” and that he “should not trust them” were recovered.

It has also been revealed that there was unspecified “Jack the Ripper material” which had notes in it, while pornography was being streamed on a television at his home.

CCTV also showed Roberts leaving his home at around 1.30am on the morning of the attack wearing the same clothing that matched items on his possession when he was arrested.

During a police interview, it was also noted that Roberts commented: “What have I done?”

Roberts initially denied the charges but changed his plea to guilty after the prosecution presented an overwhelming body of evidence to the court.

READ MORE: Anthony Roberts pleads guilty to Kleve Walk attack

Roberts, who was on licence at the time of the attack, had been released from prison just five months earlier.

Nicola Heath, senior crown prosecutor for CPS West Midlands, said: “This was among the most depraved and ferocious attacks I’ve seen in my 20 years of working as a prosecutor.

“Roberts showed no remorse, and it is nothing short of a miracle that the victim did not die during what can only be described as a truly horrifying act of violence.

“Victims of sexual violence are left with the aftermath of a destructive and life-changing crime. Although this woman survived a terrifying ordeal, she will no doubt be left with the mental scars that remain long after the attack is over.

“Her bravery, determination and strength in being able to recount the events of that evening should not be lost on any of us and I hope today’s result provides a small sense of closure for the victim.”

Roberts will be sentenced at Worcester Crown Court on Monday, October 2.