More than a year on from their plea for a new coronial inquest, the James brothers get a decision.

Will they finally get answers to the burning questions they've carried for 38 years about the murder of their mother?

And what about those items Trace has been given that might have DNA on them?

Can they identify the killer?

We take them to one of the world's best DNA labs, with some of the most sensitive equipment, to find out.