The Argentinian government said Friday that rouge intelligence agents were behind the mysterious death of prosecutor Alberto Nisman, who was scheduled to appear before the legislature Monday to allege the government covered up a terrorist attack by Iran. On Sunday, Nisman was found dead in his apartment of what appeared to be suicide. “When he was alive they needed him to present the charges against the president,” the Argentine president’s chief of staff said Friday. “Then, undoubtedly, it was useful to have him dead.” Nisman claimed that President Cristina Fernandez was conspiring to derail the investigation into the 1994 bombing of a Jewish center that killed 85. Nisman’s posthumously published report said the government offered to cover up Iran’s involvement in the terrorist attack for cheap oil and access to Argentine exports.