How is this going to benefit her at all at home? Even if the investigation comes out with the truth noone will believe it... Just terrible incompetent politics. Iran has offered her something else in return for this... I can't see any other reason for it. Either Oil, money, or a few UN votes. Such a see through move.
Defense Ministry says had no knowledge of alleged improper defense deals by Gal Hirsch (Haaretz)
from the article: Argentine president defends accord with Iran over 1994 bombing