Scientist Melissa Casias, 53, mysteriously disappeared after failing to turn up for work - and her 'skeletonised' body was found months later by a hiker despite an 'extensive' police search

Melissa Casias went missing last June after dropping her husband at their Los Alamos laboratory and was last seen walking along a state highway.

The body of a missing nuclear lab worker has been found, 11 months after she vanished without a trace under disturbing circumstances and fears she held classified secrets.