The story
After poor returns in 1998, the investors were lied to about the fund's returns, and a fake accounting firm was set up to provide misleading audited results.
In 2005, Samuel Israel III and CFO Daniel Marino pleaded guilty to multiple charges including conspiracy and fraud. Marino was convicted of fraud and sentenced to 20 years in prison. Israel was sentenced to 20 years prison and ordered to forfeit $300 million. At his sentencing Israel said "I lied to you and I cheated you and I cannot put into words how sorry I am."
From Wikipedia’s article on Bayou Hedge Fund Group, shared under CC BY-SA 4.0.3