CTV building collapse: Victims' families make public plea to Government over police decision not to prosecute

While the White Island victims' families got the news on Monday of their day in court, the families of those lost in the CTV building collapse are still fighting for theirs nearly ten years on.

They made a public plea to the Government today to review the police decision not to prosecute anyone for the disaster that killed 115 people.

The CTV families have been fighting for justice and answers for nearly 10 years and tonight say they're not giving up.

It was three years ago to the day that Police announced they were not prosecuting anyone responsible for the building collapse - despite a Royal Commission of Inquiry which found the building's design was deficient and should never have been approved.

Families' spokesperson Maan Alkaisi lost his wife. He's now urging the Prime Minister to meet with him and commission an independent review.

"We are asking the Prime Minister to listen to our request and provide the help the victims deserve after 10 years of suffering and letting down."

He says a failure to prosecute is a failure of the justice system.

"We definitely have evidence that the non-prosecution decision is not right," he says.

A Wellington lawyer is working pro bono for the families and says justice needs to be done.

"There was a significant public interest in the fact that there was no prosecution and there had been a significant loss of life arising from what it seems, at least from the Royal Commission, a failure of design and engineering," says Gary Turkington.

Alec Cvetanov lost his wife when the poorly-designed building collapsed and says it's impossible to heal when no-one's been held accountable.

"I can't move on and I simply don't agree with 'time will heal', time doesn't heal - [the] pain stays," he says.

If this plea doesn't work they will take their fight internationally to the United Nations.

"It's relevant because we have eight nationalities lost in the CTV case so there is both national and international interest in this case," Alkaisi says.

Police say on Monday they conducted a four-year investigation to determine any criminal culpability and the outcome was there wasn't sufficient evidence to take it to court.