The prosecutor's opinion flies in the face of the suicide hypothesis that has dominated the probe into Nisman's death in January 2015, days after he had accused the then president of covering up for Iran in the bombing of a Jewish center.
Exactly a year ago today Argentine prosecutor Alberto Nisman died while investigating the worst terrorist attack in the country's history occurred in 1994. The difference now is that the recent change in government has given the case new momentum.
An investigation by the University of Toronto's Citizen Lab found the shadowy ring operating in Ecuador, Venezuela, Argentina and Brazil, with researchers saying the evidence suggests it is state sponsored.
The plot thickens.
The puzzle of the the mysterious death of Alberto Nisman gets even more complicated.
Here is a timeline of key events related to the mysterious death of Alberto Nisman in Argentina, a case that dredged memories of one of the worst terrorist attacks in Latin American history.
VICE News traveled to Buenos Aires to investigate the mysterious death of special prosecutor Alberto Nisman.
Coming soon: VICE News traveled to Buenos Aires to investigate the mysterious death of special prosecutor Alberto Nisman.
Video Shows Shoddy and Shady Investigation Tainted Evidence After Argentine Prosecutor Nisman's Death
Video shows half a dozen people wandering around the crime scene, including the dead prosecutor's mother and Security Minister Sergio Berni, as investigators seemingly follow little or no protocol.
We spoke to Diego Lagomarsino, the aide who lent Alberto Nisman the gun used to end his life. In three months since the man investigating the AMIA center bombing was found dead, the case gets weirder and uglier.
Cristina Kirchner's cabinet took out a full-page advertorial in the Wall Street Journal this weekend to discredit the dead prosecutor's case against the Argentine president.
On the same day a judge categorically dismissed the claims that Cristina Fernandez de Kirchner orchestrated a cover-up for Iran, the president reshuffled key posts in her cabinet.