Frank McGarahan paid "the ultimate price", his brother said
A floral tribute from cab drivers in Norwich has been laid at a taxi rank where a banker was fatally injured when he tried to stop an attack on a couple.
Frank McGarahan, 45, of Hertfordshire, an executive at Barclays Wealth, died after the attack on Sunday.
The tribute from the drivers reads: "We taxi drivers salute you for your courage and bravery."
Detectives have charged a man with attacking Mr McGarahan's cousin and are still questioning two other men.
Mr McGarahan's brother Tony said he had paid the "ultimate price" for being a good citizen.
Mr McGarahan was waiting for a taxi with his brother and a cousin, who was also assaulted, at the time of the attack.
Norfolk Police on Wednesday charged a 21-year-old man with assaulting his cousin.
Daniel Moy, 21, of Costessey, Norwich has been charged with common assault.
Police said: "The charge is not directly associated with the death of Frank McGarahan."
Mr Moy has been released on police bail and is due to appear before Norwich Magistrates on 15 October.
Two other local males arrested on Tuesday remain in police custody and will continue to be interviewed in relation to the death of Mr McGarahan throughout Wednesday evening and Thursday.
A warrant for further detention has been granted by magistrates in relation to those two individuals.
Mr McGarahan's brother said the death was a "mindless murder" and his family would "never truly recover" from the loss.
Tony said his brother "did what was natural to him to try and help someone because they needed help".
"He would not and could not stand by and watch a defenceless young lad and his girlfriend...being mindlessly attacked by a large group of grown men," Mr McGarahan said.
"We will always be proud of Frank and we will never ever forget him.
"We will never understand how or why anyone could murder such a decent, caring and loving man."
Mr McGarahan said his family was caring for his late brother's wife and children who live in Hertfordshire.
Police said Mr McGarahan had been spending an evening out with friends and family when he saw a 35-year-old homeless Lithuanian man being attacked while he walked his dog with his girlfriend, 45, from Norfolk.
A bouncer from a nearby club, Darryl Lawton, had his jaw fractured when he tried to break up the fight, police said.
Det Supt Chris Hobley said: "[Mr McGarahan] witnessed an assault while queuing for a taxi on Guildhall Hill, after which he sustained a fatal injury.
"Officers are reviewing CCTV footage from around the city centre area and following up a number of lines of inquiry."
An inquest was earlier opened and adjourned into the death of Mr McGarahan.
Coroner William Armstrong said the banker's family, including one of his brothers, had been at his bedside when he was pronounced dead at Addenbrooke's Hospital, Cambridge, on Monday.