MONET KING, WITNESS: He said to me that she didn't feel a thing.
And I said: "Oh, Eddie", I said: "Well, where is she?"
You know, he didn't answer me.
He said: "What you don't know won't hurt you."
EMMA ALBERICI: New Zealand's Auckland Harbour is a long way from the life Monet King knew as a glamorous 31-year-old transvestite in Sydney's seedy Kings Cross.
It was the 70s, and his name was Marilyn King.
He worked as a cocktail waitress at the Carousel nightclub.
Upon his return to New Zealand 20 years ago, he took up painting, became a born-again Christian and a community health worker.
But in all these year he has never forgotten his live-in boyfriend of 10 years, Eddie Trigg.
MONET KING: I said: "Well, what about that blood on your shirt?"
He took off his shirt to change it and there was a piece of paper, notepaper in the top pocket, and he said: "Oh, I'll need that.
Give that to me.
I'll need to show that to the police.
That's my alibi of why I had to see her".
EMMA ALBERICI: That piece of paper was later to become police exhibit eight, a receipt for $130 written by Juanita Nielsen supposedly in recognition of a deposit paid for advertising in her newspaper Now.
MONET KING: I said: "Oh, look, there's a bit of blood on it" and I said: "For goodness sake, what on earth's going on", so the piece of notepaper, instead of being the whole piece, was suddenly cut in half and the piece with her signature on was kept and the other bit with the spot of blood on it, like the spot of blood on his shirt, was cast out into the rubbish.
EMMA ALBERICI: Eight years after Juanita Nielsen's disappearance, Eddie Trigg was sentenced to three years in jail for conspiracy to abduct her.
His colleague from the Carousel, Shane Martin Simmonds, got just two years because he confessed to the crime.
He told police a story about trying to secure advertising in the Now newspaper was just a ruse.
The real intention of a visit to Juanita Nielsen's home in Victoria Street on June 30 was to kidnap her.
But on that day she wasn't alone and their plan was foiled.
PETER REES, AUTHOR, KILLING JUANITA: It's hard to believe that there could be two different plots going on at the same time that were not connected in this way.
After all, both Eddie and Shane were at the Carousel on the morning that Juanita went round to conduct a purported advertising deal which was later proved to be a ruse.
EMMA ALBERICI: For author Peter Rees, Juanita Nielsen's disappearance has become somewhat of an obsession.
He's been following the case since day one and believes his book, Killing Juanita, and the wealth of new information it contains could finally lead to a murder charge, something the coronial inquest, the longest in NSW history, was unable to achieve.
PETER REES: So far as the involvement of the third man is concerned - we don't know, we can't say for certain, that he fired the gun.
He was standing there with a gun in hand when Loretta Crawford walked into the storeroom.
EMMA ALBERICI: What Monet King, formerly Marilyn, reveals in our interview, he has never before told police.
Having previously denied being a witness, he now links Eddie Trigg to a sinister deed.
Monet King says for a month before Juanita's disappearance, he helped Eddie track her movements.
We caught up with Eddie, now 63-years-old, and living in Sydney.
He refused an on-camera interview, maintaining he has no idea what happened to Juanita Nielsen.
His girlfriend at the time believes he's lying.
MONET KING: And I said: "Well, thank goodness.
Is she all right?
Where is she?
Has she gone home?"
And he showed me his fist and it was swollen, dreadfully swollen, and he said: "If the police ask, if the police ask what happened, say that I hit you."
And I said: "Well".
EMMA ALBERICI: Juanita Nielsen wasn't the first anti-development campaigner to face intimidating tactics.
ARTHUR KING, ANTI-DEVELOPMENT CAMPAIGNER: I was asleep at the time, yeah.
Two guys came, one on either side of the door, opened the door, bundled me out, out here to Victoria Street.
We were away from Sydney for three days.
But a condition of my release was that I would take no further part in any anti-development activities in Victoria Street.
EMMA ALBERICI: For a time before his abduction, Arthur King was head of the Victoria Street residents action group, another thorn in the side of Frank Theeman's development plans.
LORETTA CRAWFORD: The entrance was actually those three whole doors.
There was the one entrance to the Carousel Cabaret.
There were three small stairs, then a landing, then two lots of stairs going up which would have led to my office, and after Eddie and Juanita had their meeting.
Then Juanita, Eddie and the third man came down the stairs.
Once they went to the stairs below my office where the grill was, that's where I heard a clang and I heard someone make the statement about trouble makers get what they deserve.
EMMA ALBERICI: The manager of the Carousel nightclub, Jim Anderson, was a close friend of property developer Frank Theeman and his drug-troubled son Tim.
The inquest heard that on Sunday May 25, 1975, just six weeks before Juanita Nielsen's appointment at the club, the Theeman's family company, FWT Investments, paid $25,000 to Jim Anderson.
Anderson claimed the cheque was an advance for a club bought here on Bondi Beach on behalf of Tim Theeman.
He told the jury he paid $23,000 to a local club owner.
But when questioned at the inquest, the club owner said he'd never received any money from Anderson or the Theemans.
So the question still remains - what was that $25,000 for?
PETER REES: That's very much the case.
EMMA ALBERICI: What do you suspect it was for?
PETER REES: I suspect the money was paid to remove Juanita Nielsen.
EMMA ALBERICI: Hit money?
PETER REES: Hit money indeed.
EMMA ALBERICI: Those close to Juanita Nielsen have all passed away and are resting here in the Foy-Smith family crypt.
A lone cross stands in the place she would have been buried had the 38-year-old's body ever been found.
Her nemesis, property developer Frank Theeman, died in 1989.
But the three men present on the morning of her last apparently fateful meeting are still alive.
Twenty nine years on, the project Juanita fought so desperately against now dominates the harbourside landscape.
LORETTA CRAWFORD: I felt guilty, I think, yeah.
Because I often wonder what would have happened if I would have sort of said something to her like: "Just go.
Just don't stay here". I just want the people who did this to be brought to justice.
KERRY O'BRIEN: And police have confirmed they'll follow up those fresh leads in the Nielsen case.
Emma Alberici.