Police are keen to find two men who may hold key information to find the person responsible for the suspected murder of Anita Rose.
Ms Rose, 57, was found by a member of the public lying unconscious on a track near Rectory Lane in Brantham on Wednesday, July 24.
She was taken to Addenbrooke's Hospital after sustaining a serious head injury where she died four days later.
As part of a murder investigation, officers have reviewed more than one hundred hours of CCTV and are keen to speak to two individuals who are believed to hold key information that could find the person responsible.
Detective Superintendent Mike Brown said: "Following our CCTV searches, house to house and witness enquiries, we have been able to narrow down who we would like to speak to in connection with Anita's murder.
"It must be understood that we believe they may be able to assist us in our enquiries and are not suspects in this case."
Everything we know so far about the suspected murder of Anita Rose
READ MORE:A 45-year-old man from the Ipswich area was arrested on suspicion of attempted murder and later rearrested on suspicion of murder in the wake of Ms Rose’s death.
A 37-year-old woman, who is also from the Ipswich area, was arrested on the same day on suspicion of handling stolen goods in connection with the incident.
The pair were released on bail with conditions to return on October 25.
A third person, a man in his 20s who is also from Brantham, was arrested on suspicion of murder on Wednesday, July 31 a week after the incident happened.
He was released on bail until October 24 with conditions including not enter Brantham or Manningtree.
No charges have been made since Ms Rose's death.
Detectives investigating the attack have also released an updated map of what is believed to be the route Ms Rose took on the morning of the incident.
Tracking from an app on Ms Rose's mobile phone revealed her walk started at 5am in Palfrey Heights.
The walk reached the end of Newmill Lane by the river, where she turned around and returned back up Newmill Lane where the app was manually stopped at 6.03am close to The Street.
Analysis showed it was normal for the app to be stopped at this point during Ms Rose's walk.
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Officers are also continuing to search for a missing cerise Regatta Calderdale jacket, which Ms Rose is believed to have been wearing at the time of the attack, and a black wallet style quilted phone case with a gold crown and stud detail.
Anyone who recognises the two men or anyone with information that may aid with the murder investigation should contact Suffolk police, quoting crime reference number 37/41580/24.
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