plot thickens in Argentine scandal | Reuters

BUENOS AIRES Alberto Nisman was working hard to prepare for a congressional hearing on his claim that Argentina's president tried to whitewash Iran's alleged involvement in a bombing that killed 85 people, a make-or-break day in his career as prosecutor.

In the spotlight since leveling his hefty accusations last week, Nisman needed to make a convincing case, based on a decade of work with spy agencies around the world.

So he put in the extra hours at his Buenos Aires apartment on Saturday. Friends described him as upbeat and determined ahead of his appearance and he was scheduling interviews with journalists for the coming days. He also reportedly wrote up a list of groceries