This is Death in Ice Valley, an original podcast series from the BBC World Service and NRK.

She appears to have been everywhere a stranger and yet she wasn't alone after all.

It was not like they were very friendly to each other.

It didn't sound like it was friendly.

They were arguing, they weren't smiling or anything like that.

I'm Mardi Teigroth.

And I'm Neil McCarthy and this is episode 7, Mystery Men.

So last thing we knew, the isotope results of the teeth were being sent to the other side of the

world for analysis by somebody very well qualified.

I have to be busy in astrophysicist, chemist, physicist.

I have to understand the universe and all these things around us.

Just to solve a simple case.

Julian Hougivov is a Dutch isotope's expert at the University of Canberra in Australia.

He understands what we're made from down to stardust and he applies his knowledge to forensic science,

helping the police to crack identification cases.

And he studied the isotope results of the Eustal woman.

Remember these are traces of elements in the teeth, which can indicate where a person grew up,

based on the food and what are they consumed as a child.

I'd like to have a very professional approach as a forensic scientist to my casework.

So when our colleagues contacted me, he says, well, just give me the results of the teeth.

And don't tell me anything about the case, because I don't want to have be biased about

where the police might think the person might come from.

...