A reward of £20,000 is available for information leading to the arrest and conviction of the man who attacked and left a former BBC Radio Sheffield presenter for dead.
Jimmy Carol suffered serious head injuries when he smashed his head on the ground after being punched in Benidorm last week.
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The former radio star, who was working as a stand-up comedian in the Spanish holiday resort at the time of the attack, is believed to have been punched when he stepped in to help a woman who he believed was being harassed by a group of men.
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It is now suspected that Jimmy, from Chapel en-le-Frith, Derbyshire, may have intervened in a 'domestic' incident.
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He is being treated in intensive care in a hospital Alicante and his family said 'a miracle' is needed if he is to survive.
Posting on Facebook over the weekend, his son, James Everall, said: "He is on life support and the machine is doing his breathing. He has a third CT scan on Monday to see if the bleeding and haemorrhaging reduce but due to his multiple skull fractures the medical team are unable to perform surgery yet."
He said CCTV footage from the night of the attack appeared to show a group of three families, made up of up to 20 people, who could hold information about the attack.
James said: "From the video we can identify several people who were involved in the incident including the woman who my father was seemingly trying to console - short dark, dyed deep red-purple-plum hair, black top, short shorts and sparkly slip on shoes - after being abused by male members of the group.
"The female seems to know the group and this could have been a domestic issue that my father got caught up in."
He said the footage captured the man who attacked his dad running away with another man.
The culprit was wearing a red top and dark shorts.
James said: "Please continue to pray for my father. We really are in need of a miracle. Praying he responds soon and the CT scan is a positive response.
"Please also pray for the authorities that they would understand the gravity of this situation.
"Please also pray for my brother and I who are obviously shaken and disturbed by all of this.
"Finally, please pray for the person who did this. Pray that they realise the gravity of their drunken actions and that they have the courage to turn themselves in."
Jimmy was attacked between 11.50pm on Tuesday, July 3 and 12.30am on Wednesday, July 4.
Visit https://www.gofundme.com/jimmy-carol-reward-fund to donate to a fund set up to help pay for the reward, Jimmy's rehabilitation costs or a charity.