A man remains in a serious condition in hospital after being assaulted outside an illegal rave in Manchester.
The victim, a 29-year-old man from Leeds, was in the city on a night out, when he and his friends attended and illegal rave on Derby Street, Cheetham Hill.
Following an altercation on the street outside at about 3am on 18 May 2014, he was punched in face.
The force of the blow caused him to fall and bang his head.
He was taken to hospital for treatment to a bleed on the brain and a fractured skull and remains in a serious but stable condition.
The offender is described as white, 6ft 3in tall, of large build but not muscular, in his late 20s or early 30s with short dark hair that appeared longer on top and shaved at the side. He had a unshaven face and was wearing a distinctive red T-Shirt.
Detective Constable Matthew Adshead, said: â€œThe victim is still recovering in hospital, having sustained grave injuries to his head, however it is no exaggeration to say that such a blow could have been fatal.
â€œAs we have seen all too often all it takes is one punch to take a personâ€™s life and we are working hard to identify the person responsible.
â€œIf you were at the rave, saw what happened or have any information about the person responsible please come forward.
â€œI would also like to reassure anyone who may be apprehensive about speaking to police because they were at the rave that I am only interested in the circumstances surrounding this assault and will treat all information in strict confidence.â€
Anyone with information is asked to call police at Central Park police station onÂ 0161 856 6808Â or via Crimestoppers anonymously, onÂ 0800 555 111.