The knock at the door did not unduly disturb the man relaxing on the terrace of the £1.6 million villa overlooking the Caribbean. Even when his wife opened it to discover members of the Dominican Republic’s armed police outside, Darren Patrick Nally was unfazed. He was sure his secret was safe: he was not Nally, a man who said he was an Irish singer and had already been detained in prison on charges of failing to pay his debts. In fact he was Michael Brown, a 45-year-old British fraudster whose web of lies and deceit had made him millions – £2.4 million of which he had donated to the Liberal Democrats for their 2005 election campaign, becoming their biggest single donor. As he was arrested for unpaid rent at a former apartment, Brown was nonchalant. At the police station he told the local assistant prosecutor, Elizabeth Rijo, that he would pay the debt and be back home in time for dinner.