Moynihan included a photo of himself with a letter (shown above), and was arrested by police, who recognised him from the photo.

The court heard that Moynihan told police he intended to continue his attacks and that he was "hunting for his next victim". Police thanked the three women for their "courage and assistance" with the case.

During the week-long trial, the court also heard that Moynihan has autistic spectrum disorder.

The sentencing judge said Moynihan displayed a "gross lack of empathy," The Independent reported.

"The offences were planned and premeditated," Justice Jay said. "The contents of your computers were as chilling as they were disturbing."

Moynihan's 67-year-old victim told the court her life had been "completely turned upside down" by the attack.

"I did not ask for this change, it was forced upon me by my attacker," she said in a victim impact statement.

His first victim, 20, told the court she feared going outside alone.

"There is also the physical pain of the injury," she said. "I have been suffering with chest pains which I am receiving treatment for and may be as a result of psychological trauma."