PORTLAND — Portland investment manager Jeff Grayson, who pleaded guilty to mail fraud and helping a former union pension fund trustee prepare a false income tax statement, has died. He was 67. Attorney Steve English says Grayson died Friday. No cause of death was given, but the Oregonian reported that Grayson suffered from multiple sclerosis.

Grayson was the co-founder of Capital Consultants, a firm that had $1 billion in assets at its peak. Under his leadership, the company took on risky, unorthodox deals, some of which proved extremely profitable for the firm and its clients, including union pension funds.

The U.S. Securities and Exchange Commission in September 2000 sued Grayson and Capital Consultants for trying to hide massive investment losses from clients.