Una Crown: New appeal in hunt for widow's murderer
11 July 2013 Last updated at 14:24 BST
Police have started door-to-door inquiries in the Cambridgeshire town of Wisbech as the family of an 86-year-old widow made a fresh appeal to catch her killer.
Una Crown's body was found in her burned-out bungalow in Magazine Lane six months ago.
Her niece, Judy Payne, said the murder of her "kind-hearted and very private" aunt was "beyond comprehension".