The judge presiding over the murder trial of Frank Chivers said his family’s suffering had been “prolonged”.
After a jury convicted Sean Conlon of murdering 49-year-old Mr Chivers – the father of missing teenager Paige – Judge Anthony Russell considered a moving victim impact statement from the victim’s mother Dorothy and sister Carol.
Judge Russell said: “Frank Chivers was a much loved man who had a very difficult life, losing a wife to illness and a daughter who has disappeared – what has happened to her remains a mystery.
“His mother has suffered other tragedies and the circumstances of the death were particularly distressing.
“Their agony and suffering has been prolonged.”
Mr Chivers’ mother told The Gazette her son “never coped” with Paige’s disappearance.
Preston Crown Court heard Mr Chivers’ best friend Sharon Garnett was left to administer CPR after the attack, while making a 999 call to the emergency services.
As she did that, Conlon went around the flat collecting his drugs before walking out the door.
Judge Russell said: “You displayed a callousness after the event which is quite shocking. Although you had some knowledge of first aid, you did nothing to try and help keep Mr Chivers alive.”
The judge also said Conlon had shown a lack of concern for the seriousness of the inquiry and “absolutely no respect” for the police, the court or Mr Chivers.
“It has been quite obvious throughout the case you couldn’t care less about the unfortunate victim of your crime”, the judge told him.
During police interviews he had given what he called “stupid” answers to police because they were asking him “stupid” questions.
Former Montgomery High School pupil Paige, who would now be 21, went missing just months after her mother Sheila died.
She had argued with her father prior to her disappearance and was last seen boarding the number 11 bus on Ashfield Road, near to the then family home in Longford Avenue, Bispham, on August 23, 2007.
Her family put out numerous appeals through the media since she disappeared but heard nothing. Detectives are now treating her disappearance as murder.