The criminal insider trading trial against Galleon hedge fund founder Raj Rajaratnam begins tomorrow.

Sri Lankan-born Rajaratnam, 53, allegedly used insider information for illegal transactions that brought him at least $ 45 million, AFP reported quoting US government prosecutors. The federal prosecutor in New York described the case as the “the largest hedge fund insider trading case in history” and the biggest insider trading case since the 1980s, media reports say.

Rajaratnam, who is free on $ 100 million bail, says he is innocent. The trial is expected to last six weeks.

He faces a total of 205 years in prison and more than $100 million in fines if found guilty on the charges, which stem from transactions that occurred between 2003 and 2009. Lloyd Blankfein, chief executive of Goldman Sachs, could be called by US prosecutors to testify, according to the Wall Street Journal. A spokesman for the bank, subject of a Galleon transaction in 2008, declined to comment.

The Journal also reported that it’s likely Rajaratnam would testify in his own defence — a risky strategy for any defendant.

Meanwhile British daily Financial Times has reported that US prosecutors plan to play recorded phone calls between Rajaratnam and several Galleon employees to bolster allegations that he traded on inside information.