Detectives have released a description of a man wanted over a savage assault at southern Lake Macquarie.
56-year-old Graeme Wilton was on his daily walk along Griffith Road, Mannering Park at about 7.30pm on Thursday, December 12 when a white utility pulled up.
The driver got out and punched Mr Wilton in the head, causing him to fall.
Mr Wilton sustained life threatening injuries in the attack and remains in hospital.
The man is described as being of Caucasian appearance, aged in his 20s to early 30s, approximately 180cm tall, with short dark hair.