Before death, prosecutor drafted request to arrest Argentine president

A special prosecutor who was found dead last month in his home under mysterious circumstances had written draft document requesting the arrest of Argentina's president and foreign minister, the lead investigator in the case said Tuesday.

Alberto Nisman was found dead in his apartment on Jan. 18, hours before he was to detail allegations that President Cristina Fernandez protected former Iranian officials accused of orchestrating the 1994 car-bombing of a Jewish center in Buenos Aires.

Investigator Viviana Fein said Nisman had drafted a detention request, which was found in a trash bin in Nisman's apartment, alleging Fernandez tried to shield Iranian officials for their alleged role in the bombing. It was not included in a complaint Nisman had filed in federal court days before his death.

The newspaper Clarin said the draft warrant was prepared in June 2014, according to the New York Times.

CBS News correspondent Manuel Bojoroquez reported that there are growing calls for an international investigation into Nisman's mysterious death and one Argentine congresswoman is looking to the United States for help.

As a stunned nation watches, investigators appear no closer to determining whether Nisman killed himself or was murdered. The special prosecutor died before alleging a coverup that reached all the way to the presidential palace.

Argentine congresswoman Patricia Bullrich spoke to Nisman the day before he died, but said he never told her about specific threats.

"He said to me he was afraid for ... two daughters. He received a lot of threats," Bullrich said.

She wants the FBI to assist in the probe of Nisman's death. She believes everyone has a stake in getting to the truth.

Fein said Friday that traces of DNA found on the pistol, its ammunition and other items from the scene "undoubtedly" matched that of Nisman.

She also said a security camera in the service elevator of his apartment building was not working and there were no cameras in its stairwell.

Supporters of Nisman have insisted the prosecutor would not have killed himself and even Fernandez has said that, contrary to initial findings, his death could not have been a suicide.

Nisman had feared for his safety and 10 federal police were assigned to protect him. The officers were suspended as part of the investigation but none have been named as suspects.

Fernandez has denied any connection to the 1994 bombing, which killed 85 people and remains unsolved.