(JTA) – The late special prosecutor into the bombing of the AMIA Jewish center, Alberto Nisman, was remembered both in Argentina and Israel on the second anniversary of his still-mysterious death, as the investigation into whether it was a murder or suicide continues.

Federal prosecutor Eduardo Taiano, who is investigating the cause of death, reportedly is analyzing whether Nisman’s death occurred on Jan. 18, 2015, the night when the body was found, or the previous day. In that case Diego Lagomarsino, a colleague of Nisman who currently is under investigation for lending Nisman a gun on Jan. 17, 2015 could move more into the spotlight since he was in Nisman’s apartment twice that day. Nisman’s former wife Sandra Arroyo Salgado, who is a federal judge, told Perfil newspaper that she believes Lagomarsino was involved in Nisman’s murder.

Meanwhile, there was a demonstration in Buenos Aires on Jan. 11, the second anniversary of Nisman’s death, in front of the AMIA special prosecutors unit, which was managed by Nisman until his death. Also on Jan. 11, a tribute was held in the Knesset in Jerusalem with the participation of the Argentinean ambassador to Israel. In the evening a tribute was held to Nisman in the coastal city of Nahariya.

In March 2016 the Buenos Aires Criminal Appeals court ruled that the case must be heard in federal court. No official cause of death has yet been determined.

Nisman was found dead in his Buenos Aires apartment on Jan.18, 2015, hours before he was to present evidence to Argentine lawmakers that President Cristina Fernandez de Kirchner covered up Iran’s role in the AMIA Jewish center bombing, which left 85 dead and hundreds wounded. Nisman’s case against the former president and members of her government will be investigated beginning on Feb. 1, after the judiciary returns from its January summer break. After Nisman’s accusations initially were dismissed, an Argentine court in December agreed to investigate the case.