Colombo, Jan 27 (Reporter) Sri Lanka's police arrested a couple on Saturday on suspicion of defrauding people of 5 billion rupees (15.7 million U.S. dollars) through a pyramid scheme, said the police. Police spokesman Nihal Thalduwa told the media that the two were arrested in Pilimathalawa of the country's Central Province. One of the suspects is a teacher while the other is an actress, the police spokesman said. The police urged people who have been defrauded by the suspects to lodge complaints and assured that they would protect the anonymity of plaintiffs...////...