Question: Who is the former Sri Lankan- hedge fund manager that was investigated by BJ Kang for insider trading?
Sentence (from "Raj Rajaratnam"): Raj Rajaratnam (Tamil: ராஜ் ராஜரத்தினம் ; born Rajakumaran Rajaratnam; June 15, 1957) is a Sri Lankan-American former hedge fund manager and billionaire founder of the Galleon Group, a New York-based hedge fund management firm.
Relevant evidence: Yes