Police have been in Wisbech today in the hope of encouraging someone to come forward with the vital information they need to find the killer of Una Crown.
Officers have been putting up posters and urging members of the East Cambridgeshire community to think back one year to the day of the murder.
Una Crown was stabbed to death before her body was burned at her home at Magazine Lane.
No-one has been charged with her murder.
Dt Sgt Graham McMillan led today's appeal.