Is Steve Cohen Going Down?

With arrest after arrest in a massive, seven-year insider-trading investigation, U.S. Attorney Preet Bharara is getting closer to the biggest fish of them all: Steve Cohen, founder of SAC Capital, the $14 billion hedge fund, who some regard as the most successful stock picker of his time. C.E.O.â??s have fallen, lives and companies have been upturned, but Cohen has thus far escaped. Bryan Burrough and Bethany McLean go deep inside Bhararaâ??s probeâ??and SACâ??s org chartâ??to reveal just how much blood is in Wall Streetâ??s waters.