Martha Stewart is a well known (in the US) public figure. She is famous for tips to homemakers about crafts, simple housekeeping clues, and decorating. She's gotten incredibly rich doing this, through her own magazine, TV shows, etc. She alos sat on several corporate boards, headed her own company, and had a history as a stock broker.
A couple years ago when Imclone imploded, it was alleged that she was warned it was coming by Sam Waksal , the CEO of Imclone. That would be illiegal insider trading. She sold her stock in the company at a good profit shortly before it collapsed. She claimed that she had a limit order in, and that it had nothing to do with any conversations with Waksal.
They never proved she was doing insider trading, but they did convict her for lying to the SEC. She did 5 months in jail, even as she appealed the verdict, and was just released.