Following the Federal Court's conclusion that Nisman was indeed murdered as a result of his charges against the ex-president, she is indeed to be investigated as to her connection in this heinous crime, even if at this stage she may be called simply as a witness. She has to worry over this, as even a layman is able to stack up the numbers, so to speak.

Nisman death - Federal court points the finger at Cristina Kirchner
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In a fair world, she should spend every waking hour worrying about her crimes against Mr. Nisman and all the people of Argentina.
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Tomorrow will be six years since Alberto Nisman was found dead in his apartment and we're no closer to finding the killer.
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It’s hard to believe that he died 6 years ago. How aggressively do you think they are pursuing the case, especially with Madam Vice President in office?