The prosecutor whose suspicious death set off a crisis for Argentina President Cristina Kirchner no longer trusted even his bodyguards at the violent end of his life, an assistant said Wednesday. A tense Diego Lagomarsino, his voice breaking at times, recounted at a news conference in Buenos Aires how Alberto Nisman had pleaded to be given the .22-caliber revolver that was used to put a bullet through his head. The 51-year-old special prosecutor was found dead at his home January 18, a day before he was to go before a congressional committee to make a bombshell accusation: that Kirchner shielded Iranian officials implicated in the 1994 bombing of a Jewish charities office, known as AMIA. “He told me that he was not going to use the weapon,” Lagomarsino said.