Julian Webster died after a night out with friends on Deansgate
Relatives of a man who died after being restrained outside a Manchester bar in 2009 have staged a rally demanding charges be brought in the case.
Julian Webster, 24, died in hospital after an incident outside the Pitcher and Piano on Deansgate Locks in April 2009.
Two men, aged 25 and 29, were arrested on suspicion of murder, and remained on police bail until January.
Mr Webster's mother Sonia said that dropping the enquiry was diabolical".
She was joined by other members of her family at a protest outside Manchester's Crown Prosecution Service (CPS) offices where they handed out leaflets demanding justice for her son.
Mrs Webster said: "Someone is responsible for my son's death and I want justice for him.
"We want the CPS to look at this again as we are all just gobsmacked that two men can have been arrested and kept on police bail all that time."
Mr Webster had been on an evening out with friends from his home city of Birmingham when he died.
Two post-mortem examinations were carried out into the cause of his death, both inconclusive.
A Greater Manchester Police spokesman said: "The evidence was fully reviewed by a CPS lawyer and a QC, and a decision was made that no further action would be taken against the men."
Evidence in the case has now been passed to the coroner, who is expected to open an inquest in the summer.