Police have charged one man over an attack in Spalding but the victim still remains a mystery.
Aldis Blumbergs, 43 and of Alexander Road, has been charged with GBH with intent and will be in Lincoln Magistrates’ Court on Friday morning.
Lincolnshire Police arrested one more man, 23, and two women, 40 and 18, in connection with the assault.
The 23-year-old man has been released under investigation, the 40-year-old woman has been released on bail, and the 18-year-old was released without further action.
As previously reported, officers attended reports of an assault just after 7.20am on Wednesday, February 5 on Cedar Court.
The victim, who police have not been able to identify, was found with a serious head injury.
Anyone with information has been urged to call 101 and quote incident 63 of February 5.