Police are appealing for witnesses to come forward, after a man was discovered with a life-threatening head injury in Bolton.
At around 2am on Friday 25 July 2014, police were called to the junction of Chorley New Road and Chorley Old Road in Bolton, and discovered an unconscious man with a serious head injury.
Police also found a dog next to the man and detectives believe he was out walking his dog and, because of the nature of his injuries, they believe he was attacked.
The man, 49, was taken to hospital and remains in a critical condition.
Detectives have launched an investigation to determine what happened and are appealing for the publicâ€™s help to trace the attacker.
Detective Superintendent Jon Chadwick said: â€œThis man is extremely poorly and, from the extent of his injuries, we believe he was violently assaulted.
â€œHe was out walking his dog when he was attacked and we are urging people to come forward if they were in the area at that time and witnessed the attack or remember seeing the dog in the photo.
Anyone with information should call police on 101 or the Crimestoppers anonymously on 00800 555 111.