A 46-year-old man suffered head injuries during an assault in Eastbourne.
The local man is still being treated at the Hurstwood Park neurological unit, Haywards Heath, where his condition is critical.
A 25-year-old woman has been charged with causing grevious bodily harm with intent at Eastbourne Magistrates Court on Saturday, July 27.
The victim suffered serious head injuries during the attack between him and two women in Seaside Road just before 11pm on Wednesday, July 24.
Sussex Police say that an unknown man intervened and assaulted the victim before running off.
The man is described as white, in his early 30s, of tanned complexion, 6ft with short cropped hair. He was wearing a white T-shirt, blue jeans and white footwear.
We are currently following certain lines of enquiry and are still keen to hear from anyone who saw what happened, as well as anyone else who has any other information about the incident.
It is still not clear exactly what caused the altercation, or why the man intervened. We are still seeking the second woman, as well as the man whose description we have issued."