The former chairman of the Enron corporation in the United States, Kenneth Lay, has surrendered to authorities in Texas.
He was indicted for his role in the scandal that destroyed the company, which was once the seventh largest in the country.
Mr Lay surrendered to the FBI at its offices in Houston. He declined to comment, but in an earlier statement he said he had done nothing wrong and that the indictment was not justified.
Mr Lay is the most important official charged in a two-and-a-half-year investigation that has so far led to ten convictions.
The Texas-based energy giant went bankrupt in December 2001 in one of the biggest ever corporate financial scandals.
It had been using off-the-book deals to hide massive debts. Company accounts falsely inflated profits, yet its executives were making millions.
