Another SAC Capital employee was convicted on Thursday for his role in what prosecutors claim to be the most lucrative insider trading scheme in American history. Mathew Martoma was a portfolio manager at Steven Cohen's $14 billion hedge fund, which used confidential information about investments to profit and avoid $275 million in losses. Martoma is the eighth employee to be found guilty. He was charged with conspiracy and securities fraud, and faces a maximum of 45 years in prison. Last year, SAC Capital agreed to pay $1.8 billion in settlements.