The Justice for Julian support group, together with Julian Webster's family, are writing to The Home Secretary Theresa May calling for a Judicial Review.
Mr Webster, 24, from Birmingham, had returned to the pub in question after a night out to retrieve his mobile phone.
The police were called and when they turned up asked the door staff to release him. When they did, he was dead.
The Crown Prosecution Service decided it was not in the public interest to prosecute the door staff.
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Organisations across the Midlands are today urging people to spot the signs of modern slavery in a bid to stamp out the crime.