A man arrested on suspicion of murdering Wisbech pensioner Una Crown has been bailed by police.
The 44-year-old Wisbech man was arrested by detectives investigating the killing of 86-year-old Mrs Crown in January 2013.
Mrs Crown was stabbed to death in her home in Magazine Lane, Wisbech on January 13.
Her body was then set on fire.
The Wisbech man will return to Thorpe Wood Police Station in Peterborough on 23 March to answer his bail.
Detectives are continuing to investigate the case in an attempt to trace the pensioner’s killer.
A £10,000 reward from the independent charity Crimestoppers is still on offer for information which leads to the arrest and successful conviction of Mrs Crown’s killer.
Detective Chief Inspector Sharn Basra, from the Bedfordshire, Cambridgeshire and Hertfordshire Major Crime Unit, said: “It has been two years since this terrible crime happened and we still believe the answer to solving it lies within the local community.
“I’m asking people to really think about what they were doing in the days before and after Mrs Crown’s death – did you see anything suspicious? Did someone you know come home smelling of smoke, acting strangely, or had clothing that was burnt or had blood on it?
“Someone out there knows what happened in Magazine Lane that weekend and I’m asking them to do the right thing and call police or the charity Crimestoppers.”
Anyone with information about the case is asked to call police on 101, or Crimestoppers, anonymously, on 0800 555 111.