WASHINGTON (Reuters) - A federal jury in Ohio convicted the former chief executive of National Century Financial Enterprises of witness tampering and conspiracy, the U.S. Justice Department said on Wednesday.Lance Poulsen, the former head of the healthcare finance company, was convicted after a week-long jury trial along with his personal associate, Karl Demmler, the department said in a statement.The witness tampering charge was linked to a key witness who was scheduled to testify in the trial of Poulsen and others related to an alleged $2 billion fraud at the company, the government said. National Century filed for bankruptcy in 2002 after an auditor refused to sign its financial statements and lenders stopped advancing funds.(Reporting by Julie Vorman; editing by Carol Bishopric)
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