Software company founder John McAfee was taken to hospital on Thursday after being denied political asylum in Guatemala.
McAfee told The Associated Press that he suffered chest pains overnight but didn't believe he had a heart attack.
A government doctor said he appeared to be suffering from high stress.
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The founder of a free school and two ex-staff members have been jailed for defrauding the Department for Education of thousands of pounds.
Pino Pagliara told ITV News a lucrative salary meant he told undercover reporters posing as football investors "what they wanted to hear".
She was best known for playing Ethel Meaker in the children's show Rentaghost and Grandma on stage in Billy Elliot the musical.