Authorities brought cadaver dogs to search the property next door to the Garridos as they tried to determine whether Garrido was connected to a string of unsolved slayings of prostitutes in the 1990s.
To date, regulators and prosecutors have not named Cohen or accused him of anything, but a string of charges against traders connected to SAC makes it seem as though the net is tightening.
He believes the case is connected to the recent arrests of generals, academics and journalists linked to a string of murders, including that of an ethnic-Armenian editor, Hrant Dink.