Preet bharara

WASHINGTON - Raj Rajaratnam, the Sri-Lankan-born billionaire investment wizard who founded Galleon Group, was arrested Friday along with five others on federal charges of illegal insider trading.

NEW YORK - One of America's wealthiest men was among six hedge fund managers and corporate executives arrested Friday in a hedge fund insider trading case that authorities say generated more than $25 million in illegal profits and was a wake-up call for Wall Street.