When the jury hear the Mr Big tapes, David's confession is held up to scrutiny.

The jury hears the detail of David's confession. How he did it. Why he did it. Where it happened.

And it turns out most of it is untrue. .

Defence lawyers say the seeds of David's confession were planted in the initial interviews, when police told David how they thought he did it.

The fakeness of David's "confession" hangs heavy.

Then, another bombshell. Suddenly there seems a lot less reason to doubt this confession.

Go to this episode on rnz.co.nz for more details