Two people including a teenager were being questioned last night about the murder of a father-of-two killed after confronting youths who had vandalised his sister's car.
Alan Fessey, aged 31, was attacked in front of his parents outside their home in Edinburgh Road, Camp Hill, Nuneaton, Warwickshire, on Friday night.
Police arrested a 15 year-old boy and a 49 year-old man.
One witness claimed more than a dozen drunken youths, one thought to be as young as 12, turned on Mr Fessey's sister, Jo, after damaging her car with a bottle of WD40 lubricant.
"They had been roaming up and down all day, causing trouble. As soon as they were asked to move on they started abusing Jo, calling her all sorts of names.
"Alan stepped in and told them to go away but they just got more abusive. Then a guy who was with Alan hit the ringleader, a teenager, who fell to the ground.
"The teenager then ran and broke a bit of wood off a nearby fence to use against Alan and his friend but lost his bottle. He ran home to get his dad, who turned up 20 minutes later on a scooter.
"It all happened so fast from there. There was loads of shouting and screaming. Alan was trying to calm things down when two lads jumped on him and started punching him in the face.
"Alan's parents, Ray and Carol, came over to stop the fight but then Alan was hit in the neck by a glass bottle thrown by one of the teenage boys.
"I don't know if it was broken but Alan fell to the ground straight away and didn't get up. Ray and Carol bent over him in the road screaming his name and shouting for help.
"But it was pretty clear he was dead."
Mr Fessey, from the Bucks Hill area of Nuneaton, was rushed to the George Eliot Hospital where he was declared dead about an hour after the attack, which happened at 7.15pm on Friday.
Detective Inspector Nigel Jones, who is heading the investigation, said: "This incident happened during daylight hours on a summer evening and we know there were a number of young people and adults in the area at the time. We are appealing for anyone who has not already spoken to the police to contact us
"We particularly urge any of the young people in the area to come forward to speak to us."
Anyone with information can contact Nuneaton CID on 02476 641111 or Crimestoppers anonymously on 0800 555111.