Information from the Prosecutor of Hessen
In 1959 information reached Israel indicating Eichmann managed to escape to Argentina, and was living there with his family. The details arrived from the public prosecutor of the province of Hessen in Germany, who told that elements from the Vatican issued Eichmann a passport bearing the name Ricardo Klement. The Klements, as they were now named, resided at Chacabuco Street 4261, Buenos Aires.

Following the leads, an operational team comprised of Mossad and ISA men departed for Buenos Aires in 1960 to try and corroborate the intelligence and trace Eichmann. The team discovered that the Klements had relocated, but using common sense, they were able to trace Eichmann's son's work place at a local garage. The team could not get any information from the son but a clandestine surveillance brought the team to the Klements' new residence: Garibaldi Street at the outskirts of the city.

Photographing without corroboration and preparing for the operation
The Klement house was surveyed and observed allowing the team to take photos of the house and of the man suspected to be Eichmann. The team felt certain that he must be the notorious Eichmann but lacked the proof.

At the same time, Isser Harel, Head of Mossad and in charge on Israel's security services, decided to proceed with the operation and bring Eichmann for a trial in Jerusalem. The team studied Eichmann's daily routine – at the end of a work day Eichmann would take the bus home, he would alight the bus at 19:30 and walk from the bus stop to his home. It was decided that Eichmann would be taken by surprise when alone and in the dark, in case the team misidentified him and would be able to release him without getting into trouble.  

It was decided that the operation would be carried out in mid-May in order to exploit the arrival of an El Al plane in Argentina for the Argentinean 150th anniversary celebrations. The night of the operation, May 11 1960, Eichmann was late from work. At last he alighted the bus at 20:05. The team grabbed and overpowered Eichmann, brought him to the car and drove off to a preplanned safe house.

The team discovered that Eichmann's glasses fell off during the take over and remained at the scene. It was decided not to return to fetch them assuming they fell into the bushes and his family would not hurry to file a missing person police report.

The interrogation at the safe house corroborates the abducted person is in fact Eichmann

The interrogation began as soon as Eichmann arrived at the safe house. The interrogators presented him questions regarding distinguishing features they had on record - shoe size, hat size, date of birth, and SS number. The man's replies suggested this was Eichmann. Eventually, he was asked to disclose his birth name – the answer he gave was no other than "Adolf Eichmann". It was then concluded that Klement was undoubtedly Eichmann.

Eichmann signed a statement in which he was willing to be trialed in Israel for his Nazi history. On May 21 1960, Eichmann boarded an El Al plane dressed as a crew member who felt ill. On May 22 the plane landed in Israel and on the next day, Israeli PM David Ben-Gurion announced the following:

"I should inform the Israeli parliament that Israel's security services tracked Adolf Eichmann, one of the biggest Nazi criminals, who was in charge with other Nazi seniors, of 'the Final Solution to the Jewish Question' – the extermination of 6 million European Jews. Adolf Eichmann is already in Israel's custody and will soon be trialed in Israel according to the 'Nazi and Nazi collaborators (Punishment) Law'".

Trial and sentence
Eichmann's trial began on April 11 1961 at the Jerusalem District Court. Eichmann, the defendant, sat inside a bulletproof glass booth to prevent anyone targeting him. Dr. Robert Servatius was appointed Eichmann's defense lawyer as no other lawyer volunteered for the role. Approximately 110 witnesses, mostly Holocaust survivors, testified at the trial. Some of them had told their stories for the first time.

The trial was broadcasted live on the radio and many followed along with it. At his opening speech, chief prosecutor Gideon Hausner stated the following:

"The place where I am standing before you, Judges of Israel, to prosecute Adolf Eichmann is not reserved only for me. At this moment, six million other prosecutors are standing with me. They cannot rise on their feet or accuse the one who sits inside the glass booth nor shout at him: I accuse. Their ashes are piled on the hills of Auschwitz and Treblinka, washed away by Poland's rivers, and their graves are scattered throughout Europe. Their blood calls out, but they are silent. Therefore, I will voice them and reiterate the horrible indictment".

On December 15 1961, Adolf Eichmann was indicted on crimes against the Jewish nation, crimes against humanity, war crimes, and membership in an outlawed organization, and was sentenced to death. Eichmann appealed to the Supreme Court but his appeal was rejected. He also pleaded for mercy from the Israeli president and was also rejected. On the night of May 31-June 1 1962, after the Israeli president rejected Eichmann's appeal for mercy, Eichmann was hanged, his body was cremated, and his ashes were scattered at sea.