An 80-year-old man who died after being attacked in a Leicestershire park died from a neck injury, say police.
Bhim Kohli died in hospital after being assaulted while walking his dog at Franklin Park in Braunstone Town, on Sunday evening.
A 14-year-old boy remains in custody after he was arrested on suspicion of murder. Four other children have been released without further action.
Police said a post-mortem examination confirmed Mr Kohli died as a result of a neck injury.
Detectives say they are continuing their inquiries to establish the circumstances surrounding the incident.
They continue to appeal for anyone who was in the area of the park or Bramble Way between 18:00 BST and 18:45 to come forward.
Det Insp Emma Matts said the circumstances surrounding Mr Kohli’s death were “extremely tragic and upsetting” not only for his family and friends but also the wider community.
She added: “We continue to offer support to the family through our family liaison officers, and the local policing teams are in the area to provide reassurance and discuss any issues or concerns.
“The family are aware of the significant public and interest in the death of their loved one and would like to thank people for their kind words and sympathy.
“At this stage, the family are asking for privacy at this extremely difficult time.
“Our investigation into the assault on Mr Kohli remains ongoing.
“We continue to keep an open mind around the circumstances surrounding the incident as we work to establish what occurred in the park on Sunday evening. I would continue to urge anyone who can assist our investigation to come forward.”
The police cordon in the park has now been lifted.
Due to prior police contact with the victim, Leicestershire Police made a voluntary referral to the Independent Office of Police Conduct (IOPC).
Following further contact with the IOPC, the force has now made a mandatory referral.