Khuram Shaikh, a red cross worker was killed in the early of December 25, 2011 in Tangalle in Sri Lanka's South and his Russian colleague and friend, Viktoria Aleksandrovna, brutally assaulted by an armed gang.
Among the suspects arrested soon after the crime was a ruling party regional politician.
Nasir Shaikh, his brother said he was planning to come to Sri Lanka to attend the trial of his brothers killers but so far there was no sign of trial.
"I've lost a brother, by parents lost a son," he told reporters in Colombo.
"I am here today to ask the Sri lankan government to do the right thing, to send out the right message, to show a commitment to uphold rule of law."
He was accompanied by Simon Danczuk, British Member of Parliament for Rochdale where Shaikh's brother lived,
Danczuk said Shaikh worked in some of the most dangerous places aroundteh world.
"At the time of his death he was on holiday trying to relax at the beach resort of Tangalle," he said.
"The