Police investigating an arson attack in Wakefield nearly two years ago in which an elderly woman died have released CCTV images of her.
A 999 call made by one of Lea Brooke's neighbours on 10 November has also been released by the force in a bid to catch those responsible.
Mrs Brooke, 81, died when her home in Sandal Grange Farm in Walton Lane was set on fire.
White spirit was poured through her letter box and ignited.
The CCTV images show the grandmother of 12 leaving St Peter and St Paul's Church in St George's Walk after the Sunday service on 9 November.
In further images she is seen in her nearby Asda store buying biscuits for a coffee morning planned for the following day.
In the 999 call, a concerned neighbour tells the operator Mrs Brooke's house is "really, really burning".
Det Supt Dave Pervin of the West Yorkshire Police's Homicide and Major Inquiry Team, who is leading the investigation, said: "These are very poignant images, the last pictures of Lea which show her going about her daily business.
"She was a lovely lady who was very well respected in the local community.
"I hope that by releasing this material it will prick someone's conscience and prompt them to contact police with the vital piece of information we need to catch the person responsible."
Police believe the mother-of-five was a victim of mistaken identity and the attackers may have been targeting her son.
He ran a construction business from her home and often stayed there.
The Crimestoppers charity has offered a £10,000 reward for information which leads to the arrest and conviction of Mrs Brooke's killer.