Who killed Alberto Nisman?

Alberto Nisman reportedly knew he had powerful enemies; enemies who might kill. Still, he persevered, raising damning accusations against Iranian officials, against Hezbollah, against Argentina’s President, against people whose hands gripped political power and live ammunition.

But last weekend, a day before he was supposed to testify in a major investigation, he was found by his mother lying in a pool of blood in his Buenos Aires apartment. He had a bullet in his head.

Nisman, an Argentine prosecutor, was determined to seek justice over his country’s deadliest terrorist attack, the 1994 bombing of a Buenos Aires Jewish community center, the Argentine Israelite Mutual Association, or AMIA, which left 85 people dead and hundreds more injured.

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