The family's human rights lawyer, Pat Finucane, reiterated his calls for an independent public inquiry into his murder on the occasion of the 30th anniversary of his assassination.
The 39-year-old policeman was shot dead by Loyalist paramilitaries on Sunday, February 12, 1989 as part of an attack involving collusion with the state.
Finucane, who represented a number of prominent Republicans, was murdered in front of his wife and children in their home north of Belfast.
Former Prime Minister David Cameron has decided not to hold a public inquiry into the murder – one of the most notorious of the disturbances – but has ordered the opening of an investigation. by an experienced lawyer.
The examination of Sir Desmond de Silva QC, former war crimes prosecutor at the United Nations, concluded that the death of the lawyer "without a general conspiracy" but revealed "shocking" levels of collusion the state share involving the army, police and MI5.
The family described Sir Desmond's 2012 report as a "whitewash" and waged a long legal battle for a public inquiry that reached the highest court in the UK.
Mr. Finucane's son, John, was a schoolboy when his father died in front of him.
He told UTV, "It's pretty surreal, 30, it's such a huge number, but after living it, it really happened in the blink of an eye.
"I was eight when my father was killed, but the campaign is really as strong as ever. We appeared before the Supreme Court last year, we are waiting for their judgment.
Gerry Adams TD, former President of Sinn Féin, also spoke at the ceremony at St Mary's University College on the road to the Falls Road.
"The UK government has been committed for years to a full public inquiry into the death of this man," Adams said.
"He was a human rights lawyer, so he was killed. Those who killed him were British Crown agents. He was also a father, a brother, an uncle, a son, he was a very complete and cheerful positive human being.
"He did not care about your politics, whether you're loyalist or Republican, trade unionist or nationalist, you have rights, that's what Pat's mantra says, and the rights issue is as important today as it's been in his day.
"We have exceptional rights issues, rights are actively denied to citizens here and around the world. It is good that we honor Pat's name, but we must also continue to fight for the rights of all. "