The daughter of a man stabbed to death more than three decades ago has told of the torment of knowing his killer is still at large.
John Gibbons was found with his throat slashed and a stab wound to his heart in his Putney flat on March 17, 1985.
His daughter Dawn, who was 16 at the time, found her 49-year-old father collapsed.
As part of a fresh appeal to trace his killer, Ms Gibbons has told of her ongoing agony more than 30 years on.
She said: "The fact that my father's killer still walks the streets of London has been extremely difficult to deal with over the past 32 years.
“The pain of what happened only gets worse as I grow older and remember what my father and I did together, especially as I now have my own daughter.
"My father meant the world to me and his death has had a massive impact on my whole life. I have to live with the grief that a person I loved is not here.
Mr Gibbons, who was divorced from his wife and also had a son, previously worked as an engineer for London Transport.
He retired due to ill-health in March 1984.
A post-mortem examination gave Mr Gibbon’s cause of death as a single stab wound through the heart.
A 28-year-old man was arrested and charged with his murder but the trial was discontinued. There have since been no further arrests in the case.
Ms Gibbons added: "I would ask from the bottom of my heart that if you have any information, no matter how small, please come forward and tell the police so I can finally get some answers about why this happened.
"If the tables had turned I know my father would not stop until he had tried his best to bring the person responsible to justice."
Officers said Mr Gibbons often socialised in pubs close to his Putney home.
Detective Inspector Susan Stansfield, who is leading the investigation, said: "We are now 32 years on and there is a chance that someone who felt they could not speak out in the 1980s may feel this is the time to see justice for John and his family."
Anyone with any information is asked to contact the incident room on 020 7230 7963; alternatively, to remain anonymous, call Crimestoppers on 0800 555 111.