The Argentine prosecutor found dead last month was the unwitting "soldier" of former counterintelligence chief Antonio Stiusso, who was seeking revenge for his firing, President Cristina Fernandez's chief of staff said.
Anibal Fernandez, who is not related to the president, told Reuters late on Thursday that it was clear years ago that Stiusso called the shots in his relationship with prosecutor Alberto Nisman, who had been investigating the deadly 1994 bombing of a Jewish community center.
Nisman was found slumped in a pool of blood, a single bullet to the head, on Jan. 18, days after filing a 300-page document accusing the president of plotting to whitewash his findings that Iran had backed the attack.
But the president's chief of staff said it was clear the document had not been written by a legal expert.
"I am convinced Nisman did not write the charges," Fernandez said in an interview in his wood-paneled office inside the Casa Rosada, the seat of government, late on Thursday. "In his role as a soldier in Stiusso's army, he ended up signing them."