island of crete. police are revealing she died of asphyxiation. arwa damon is live in crete outside the cave where the scientist was found. arwa, this case, stunning. reporter: yeah. it s actually quite eerie inside. it s a labyrinth of passageways. but just to give you an idea of what s out here, you still see the evidence that the forensics teams did come through. and what we re now learning from the chief of police is that her body was found quite by chance. because the search area wasn t focused here at all. they thought that she d gone for a run or perhaps a swim and then something had happened to her. but two locals by chance happened to have come, they were exploring this fortified tunnel system that was dug out, used by the nazis. up there you have the one of the entrances. and that s when they happened to find her. we went inside and found the location that matches what the