Andrew Fastow, former chief financial officer of Enron Corp. who was sentenced to six years in federal prison after pleading guilty to two criminal charges, spoke at a networking breakfast Thursday morning in Houston for the University of Houston’s Bauer College of Business Alumni Association.

The 90-minute event was “closed to the media,” even though it was initially advertised on the University of Houston Alumni Association website as open to the public.

Following the talk, Fastow declined to be interviewed. However, he confirmed that he’s spoken 15 other times to groups since he was released from prison two years ago. He said a number of his speaking engagements have been before business students. He said he speaks for no charge.

He also said he’s turned down offers to write a book.

In 2006, U.S. District Judge Kenneth Hoyt of the Southern District of Texas sentenced Fastow to six years in federal prison and two years of supervised release. The plea bargain Fastow agreed to in January 2004 in United States v. Andrew S. Fastow provided for a sentence of up to 10 years in prison. Fastow pleaded guilty to one count of conspiracy to commit wire fraud and one count of conspiracy to commit wire and securities fraud.

Fastow testified for the government at the 2006 criminal trial of former Enron Chairman Kenneth Lay and former CEO Jeffrey Skilling.

Fastow was released from prison on Dec. 16, 2011, according to information on the U.S. Bureau of Prisons website.