NEW YORK — As investigations proliferate into the United Nations Oil-for-Food scandal, one of the more intriguing mysteries involves a former French diplomat with a direct link to the U.N.’s executive suite: Jean-Bernard Merimee (search). The 68-year-old Merimee, one of several individuals now under investigation in France for alleged involvement in Saddam Hussein’s Oil-for-Food scams, is well known for his role in the early 1990s as French ambassador to the United Nations. What investigators have not so far highlighted is that during the period Merimee is alleged to have come into commercial contact with Saddam’s regime, starting in December 2001,...