The brother of a man who died after a street attack is due to meet his new MP on Friday to discuss the case.
Jay Abatan had been celebrating a work promotion before the attack
Jay Abatan, 42, from Eastbourne, died five days after being assaulted outside the Ocean Rooms nightclub in Brighton in January 1999.
His family and friends are campaigning for justice after manslaughter charges against two men were dropped because of a lack of evidence.
Michael Abatan will meet Hove MP Celia Barlow for an hour-long meeting.
A spokesman for Ms Barlow, who was elected in May, said it would be a preliminary briefing for her, but added that she was looking forward to finding out more details about the case.
Complaints from Mr Abatan's family about Sussex Police's failings in the investigation led to separate reviews by the Essex and Avon & Somerset forces.
A report by the Independent Police Complaints Commission found crucial errors in the inquiry, while a detective superintendent and two detective inspectors were subsequently disciplined over misconduct charges.
Sussex Police has not revealed full details of the Avon & Somerset report, but Deputy Chief Constable Joe Edwards is due to meet Michael Abatan in August to discuss the investigation.
Mr Abatan said he remains unsatisfied and is considering legal action and peaceful demonstrations to make more of an issue of his brother's case.
"I will not rest until I get a full picture of what happened and why Jay was denied justice."
A Sussex Police spokesman said arrangements were being made for Mr Edwards to meet Mr Abatan, but no date and time had been established yet.
Michael Abatan was also kicked during the attack on his brother
"A lot of the issues [surrounding this case] concern internal matters which have now been dealt with," said the spokesman.
He added that the force could not comment on anything else to do with the Jay Abatan death investigation.
Ms Barlow's help is being sought to put pressure on Sussex Police to release the Avon & Somerset report.
Mr Abatan also wants to speak to the home secretary about the force's handling of the investigation.
He claims the "unprovoked and vicious" attack on his mixed race brother, by "at least four white men", was racially motivated.
Doreen Lawrence, the mother of murdered black teenager Stephen Lawrence, has said she fully supports the Abatan campaign for justice.