"It is his view. This is a democracy. He can say whatever he wants. People living in glass houses must not throw stone at others," Rajapaksa told a news conference on the sidelines of the CHOGM summit hours after Cameron gave Sri Lanka an ultimatum to address the allegations of war crimes by March.
He said Sri Lanka must be allowed to complete its own investigation in its own time.
He added, "They have to trust us. Why can't you trust us. We have eminent people in Sri Lanka who are very independent."
After a historic visit to war-ravaged Jaffna, the first by a foreign head of government since the island's independence from Britain in 1948, Cameron this morning gave an ultimatum to Sri Lanka to conduct a credible probe into the war crimes by March, failing which he would seek an international investigation.
"I told President Rajapaksa that there is need for a credible, transparent and independent internal inquiry into the events at the end of the war (against LTTE) by the end of March. If that does not happen, I will use our position in the UN Security Council to move the UN Human Rights Commission and work with the Rights Commissioner for an independent inquiry," he said.
He said they had a "free and frank" discussion on all issues, including an independent credible probe, reconciliation and rehabilitation of Tamils.