Maria Weizmann an evidence of its importance to the Soviet regime. After Joseph Stalin's death and the admission by the Soviet leadership that the "plot" was made up, she was still kept in Lubyanka prison, and released only on August 12, 1953. Weizmann immigrated to Israel in 1956. She was officially rehabilitated after Perestroika in 1989. Maria Weizmann Maria Weizmann (; born 1893) was a sister of Israeli politician and scientist Chaim Weizmann (the first President of the State of Israel). She graduated from a university in Switzerland and worked as a doctor in Moscow from 1915. Maria Weizman and her husband
Chaim Weizmann with a chemist who arranged for a quantity of poison to be procured. According to the story, Kovner did not tell Weizmann of his intention to poison millions of Germans via their water supply, but only of the backup plan to poison SS members who were in allied POW camps. The lesser plan was put into operation in April 1946 at Stalag 13. Kovner's story was repeated in 1998 by another Nakam leader Yulik Harmatz. There is no independent evidence for the meeting and some historians doubt it. Kovner's biographer Dina Porat wrote that Weizmann was not in Palestine on