Alberto Nisman was found with a bullet wound on the right side of his head, a .22 caliber handgun and casing next to his lifeless body, in the bathroom of his locked apartment, according to a preliminary autopsy that found no evidence of anyone else’s involvement in his death.

But what would seem like a clear-cut case of suicide is clouded by the stunning timing of the prosecutor’s death, just hours before he was to give potentially incendiary testimony to Argentina’s congress about his accusation that President Cristina Fernandez and other top officials protected Iranian suspects in the 1994 bombing of a Jewish center, considered Argentina’s worst terrorist attack.