A man has been arrested on suspicion of the murder of a woman who was attacked while walking her dog.
Anita Rose, 57, left her house to take her springer spaniel Bruce for a walk at about 5am in Brantham, Suffolk, on 24 July.
The mother-of-six was found unconscious with serious head injuries on a track road near the sewage works and railway line near Rectory Lane at about 6.25am by a cyclist.
She died four days later at Addenbrooke’s Hospital in Cambridge.
Suffolk Police said the 55-year-old man was arrested in Ipswich and remains in custody.
Specialist officers are supporting Ms Rose’s family and keeping them updated on the investigation.
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Officers said Ms Rose’s dog, who was still with her, was not harmed.
It was reported in August that a post-mortem failed to find the cause of Ms Rose’s death, after which Suffolk Police said officers were continuing to investigate the case as murder.
Crimestoppers has offered a £20,000 reward for information that leads to the arrest and conviction of anybody involved in the death of Ms Rose.