Details of the largest financial crime in Marin’s history were revealed in a lawsuit filed last week by the Securities and Exchange Commission against the estate of Ken Casey, who operated a Ponzi-like scheme and stole more than $10 million until his death in May 2020. Mr. Casey’s two Novato-based companies, Professional Financial Investors and Professional Investors Security Fund, brought in hundreds of millions of dollars from more than 1,300 victims. Investors believed they were…