The former Lord Mayor of Leicester Robert Wann has been keeping a vigil by the bedside of his son who was critically injured in a stabbing in a city street.
Karl Wann, 29, from Glenfield, was attacked just before midnight on Friday in Henley Road after he had spent the evening with friends in the nearby Crow's Nest pub after playing football.
Coun Wann, a Labour city councillor and former police authority chairman, told the Mercury: "He's in a critical condition and still in an induced coma.
"His kidneys have packed in. We don't know what will happen."
"He is a big fit lad and that has helped him but he lost a lot of blood."
Councillor Wann said he had been keeping a vigil by his son's bedside since he was attacked.
He said: "I don't think I have any more tears left in me.
"I'm really struggling. We all are. We are just so worried about him. "This is the kind of nightmare no family needs just before Christmas.
"I've been by his bed almost every minute and I'll be staying here."
Karl, 29, from Glenfield, has a six year-old daughter who is away in Derbyshire.
Coun Wann, a former chairman of Leicestershire Police Authority, said: "We haven't really told her what has happened. We have said that her daddy has had a fall and is unwell."
Karl was originally taken to Leicester Royal Infirmary but is now being cared for in Leicester General Hospital.
Coun Wann added: "I would like to say how brilliant the ambulance staff and the NHS staff and the police have been.
"I can't praise them enough.
"They have done everything they could for him. They have been brilliant.
"He has had two major operations and he is still fighting."
Police arrested two men after the incident.
A 28-year-old has been charged with attempted murder and remanded in custody.
The other man, a 25-year-old, was questioned by detectives and then released.
Police have appealed for witnesses to the incident and anyone with information should call 101 or Crimestoppers, anonymously on 0800 555111.