The mother of Gareth Huntley, a Briton missing in the Malaysian jungle, told ITV News the search for her son has "intensified considerably in the last 24 hours".
Janet Southwell, who arrived in Malaysia today, said she was "very grateful" that the British and Malaysian governments were doing their best to ensure a "safe return for Gareth".
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The prince will meet the country's indigenous people on the penultimate day of his tour of the West Indies.
The University of Colorado said it is also terminating Dr Michelle Herren's non-paid medical faculty appointment.
The Dutch KLM pilot was escorted off the aircraft and taken to hospital by ambulance crews.