As boys, Robert and Andrew Kissel competed and excelled. As men, they made millions--Robert in the Asian markets and Andrew in real estate. But a darkness was chasing the brothers down. In November 2003, Robert was murdered in his posh Hong Kong apartment. Two-and-a-half years later, Andrew was found stabbed to death in his Greenwich Connecticut mansion. ? Nancy Kissel was charged with murdering her husband Robert, after serving him a milkshake laced...