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Investigator: Test of gun used to kill Argentine prosecutor finds traces only of his DNA

An image of the late prosecutor Alberto Nisman is taped to a grate next to a hand written sign that reads in Spanish; "National sadness," outside the funeral home where a private wake was held before the start of the funeral procession, in Buenos Aires, Argentina, Thursday, Jan. 29, 2015. The prosecutor was scheduled to appear before Congress the day after he was found dead in his apartment on Jan. 18, to detail his allegations that President Cristina Fernandez had conspired to protect some of the Iranian suspects in the 1994 bombing of a Jewish center. The man who gave Nisman the gun that killed him said Wednesday that Nisman feared for the safety of his daughters and didn't trust the policemen protecting him. (AP Photo/Rodrigo Abd)

An image of the late prosecutor Alberto Nisman is taped to a grate next to a hand written sign that reads in Spanish; "National sadness," outside the funeral home where a private wake was held before the start of the funeral procession, in Buenos Aires, Argentina, Thursday, Jan. 29, 2015. The prosecutor was scheduled to appear before Congress the day after he was found dead in his apartment on Jan. 18, to detail his allegations that President Cristina Fernandez had conspired to protect some of the Iranian suspects in the 1994 bombing of a Jewish center. The man who gave Nisman the gun that killed him said Wednesday that Nisman feared for the safety of his daughters and didn't trust the policemen protecting him. (AP Photo/Rodrigo Abd)  (The Associated Press)

Investigators say testing of the gun used to kill a prosecutor who had leveled incendiary charges against Argentina's president has found traces of DNA only belonging to him.

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

Lead investigator Viviana Fein said Friday that testing of the pistol and other items has turned up traces only of Nisman's DNA.

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.

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