There were reports he had faked his own death to avoid thousands of dollars’ worth of debt, and that he was on the run in Mexico.
But almost 20 years on from his disappearance, multiple searches by police, journalists and private investigators have all proved futile.
During her life, Newton-John largely kept quiet about McDermott after he went missing, although in unearthed remarks she admitted she might never fully come to terms with his disappearance.
In 2009, the actress discussed how she was haunted by the situation of losing her boyfriend.
Speaking to Australian Women’s Weekly magazine, she said: “I think there will always be a question mark.”
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