This is an ABC podcast.

If you're on an Aboriginal or Torres Strait Island a person,

we want you to know that this series contains a name of someone who has died.

One of Mark's closest friends, Jason Wahn is halfway through an interview with me at a hotel in Tamworth.

He's just given me the biggest lead in my five-year investigation.

And if it's true, this lead could solve the case.

She said, look, I've had to come around and see you guys.

I've just told me something and it's really concerned me and I need to tell you.

It's a story that comes from someone he trusts completely. She said that she had gotten drunk,

um, had become very emotional and had told her that he was there the night that Mark was dead and that he'd placed Mark's body on the tracks.

So Greg allegedly confessed to years. Mark's body on the tracks.

So Greg allegedly confessed to years ago

to putting Mark's body on the tracks.

He was Mark's friend.

He was out with Mark that night at Domino's.

We're beeping out Greg's real name.

Jason has another story about him from the day of Mark's funeral.

Mom gave us a yellow rose each to place down Mark's grave and I remember that

that was quite hesitant to do that for some reason reason, whatever, he had his own reasons.

And on the way home from the funeral,

we had to stop the car.

Sitting in the back, he became quite nauseous

...