'I don't care': Milat unrepentant to the end in chilling final interviews

In the final days of Ivan Milat's life, detectives tried a unique investigation strategy in the hope of finally extracting a confession from the infamous serial killer.

Police had Milat sit down and watch A Current Affair's exclusive interviews with the families of his victims, trying to break him down.

The parents of murder victim Caroline Clarke, Ian and Jacqui, were among them.

READ MORE: Moment cop came face-to-face with 'evil' Ivan Milat

READ MORE: Pain not over for families of Milat's victims

"She was at the beginning of her life, what might have been?" Ian said in his interview.

"Would she have married? Would she have had children? What would she have become? Where would she have lived? All of those things that any parent wishes for, for their children."

Milat, who has always claimed his innocence, never wavered.

His only reaction to seeing the family interviews was, "What do you want me to watch this for?"

"They only say what you expect them to say," he told police.

"I don't feel sorry for them. Why should I feel sorry for them?"

A Current Affair Crime Editor Simon Bouda also exclusively revealed tonight the chilling video footage and audio recordings of the final interviews detectives conducted with Milat.

In one filmed interview, Milat pretends to be asleep, closing his eyes and refusing to engage with police.

"When we discovered that you weren't doing too well last week and we were thinking about it, I thought, well, you know, even Ivan Milat, with everything that's been written about him, everything that's been said about him, even Ivan Milat has a family," one detective says.

Over the weeks following that interview, Milat gradually warmed up to two female detectives.

Few people in Australia have heard Milat speak at all over the years.

In chilling audio recordings of his interviews with the detectives, he can be heard continuing to deny any involvement in the seven murders he was convicted over.

"There's no evidence, no police evidence or whatever, and I argue that and the judiciary, they just cover it up, saying 'nah, nah, nah, the Crown didn't have to prove that," Milat said.

He also expressed frustration at being locked up.

"In the end I just got so, so angry, or I don't know what, I'm by myself, and I just chopped off my finger," he said.

Detectives tried to quiz him about other unsolved murders, with at least six cases that may be linked to the former road worker.

"You could bore me eyes out with a blowtorch and I still could not tell you one word about any of them missing people in that Newcastle area," he said.

"Whether you believe me or not, that's up to youse. I don't count, immaterial to me. But I know in my heart, in front of God or wherever, I'm quite, quite happy when I say this."

As police left Milat to take his last breath, they spoke of grief for his victims.

He responded by tell them, "I don't care, that's it".

They invited him to reach out to them at any time.

"Don't hold your breath waiting for me to call," he said.