A Â£100,000 reward is being offered by detectives hunting the killer or of Mrs Doreen Morris, who was murdered at her home in Holyhead in 1994.
Thursday this week marks the 16th anniversary of the death of the 64-year-old woman, whose badly burnt remains were discovered at her home â€˜Penrhyn Uchafâ€™ on Mill Lane.
Fourteen months after Mrs Morrisâ€™s death officers charged a man, who lived locally, with her murder, but he was later cleared by a jury at Chester Crown Court.
Today over 11,500 leaflets will be delivered by Royal Mail to properties in the Holyhead area with an appeal for information.
Mrs Morris was a healthy and popular lady whose life ended in a tragic way. She lived alone with her two dogs in a rural area on the outskirts of Holyhead and was last seen alive on Thursday, March 24th 1994.
Her badly burnt remains were found by the Fire Service, who attended the fire in the early hours of Friday, March 25 1994. The fire caused extensive damage to the property. A post mortem examination revealed that Mrs Morris had died before the fire started.
Enquiries undertaken by police at the time revealed that Mrs Morrisâ€™s home had been burgled, property had been stolen and the bungalow was set on fire.
Detective Chief Inspector John Hanson, from the Force Major Incident Team, said: â€œWe are appealing to anyone, and specifically to people in the Holyhead area that have information concerning this investigation to contact us.
"There is still time for people to come forward and tell us the truth about those who carried out this callous murder. Mrs Morris was an elderly lady who lived alone with her two pet dogs, and she was probably murdered because she disturbed an intruder/s in her own home.
â€œThe investigation has not and will not close until it is resolved, and we can offer support and protection to anyone who has information that will lead to the arrest and conviction of Doreen Morrisâ€™ killers.â€
Anyone with information is urged to contact North Wales Police on 101, if you are calling from Wales, 0845 607 1001 (Welsh line), 0845 607 1002 (English line) or Crimestoppers Wales anonymously on 0800 555 111.
Alternatively send a text message to 66767 or email â€“ firstname.lastname@example.org