Police have questioned a university graduate who travelled to Chile with missing British professor Tom Marsh.
The 23-year-old PhD student has been spoken to as part of the ongoing hunt for the University of Warwick astrophysicist following his September 16 disappearance from astronomical observatory La Silla.
Chilean police confirmed this weekend Mr Marsh had not travelled alone to the observatory on the outskirts of the Atacama Desert, where he had been working as a visiting astronomer.
