Already under fire for failing to uncover Bernie Madoff's Ponzi scheme, the Securities and Exchange Commission now faces the prospect of corruption within its ranks, as well. Federal prosecutors usually tasked with weeding out scandal elsewhere are now investigating two of their own enforcement lawyers for violating insider-trading laws. Evidence has surfaced the lawyers several times suspiciously traded stocks of companies that were under investigation. While a report released by the attorney general said one of the lawyers sent e-mails to family members recommending stocks, and the other made 200 trades in two years, both of the parties under investigation have denied wrongdoing. "My heart is pure," one of the lawyers says.