Short answers, pulled from the story.
Andrey Vyshinsky was a Soviet politician, jurist, and diplomat who served as the state prosecutor at Joseph Stalin's Moscow Trials and later at the Nuremberg trials. He was Soviet Foreign Minister from 1949 to 1953, after serving as Deputy Foreign Minister under Vyacheslav Molotov since 1940.
Andrey Vyshinsky acted as prosecutor and, in some proceedings, as judge during Stalin's Moscow Trials, including the January 1935 trial of Grigory Zinoviev and 18 other former Left Opposition supporters. He pushed investigators to secure confessions and is credited with the principle that the confession of the accused is "the queen of evidence."
Andrey Vyshinsky died on the 22nd of November 1954 in New York City. His body was flown back to Moscow, and his ashes were buried at the Kremlin Wall Necropolis.
Andrey Vyshinsky was born in Odessa into a Polish Catholic family that later moved to Baku. He studied law at Kiev University, from which he was expelled in 1902 and later graduated in 1913.
Andrey Vyshinsky is attributed by some as the author of the phrase "Give me a man and I will find the crime," a saying from the Stalin era describing his approach to prosecution. A related Polish saying, "give me the man; there'll be a paragraph for him," has also been attributed to him.
Andrey Vyshinsky first met Stalin as a fellow prisoner in Baku in 1908, then reconnected with him after the 1917 revolutions and rose with backing from Stalin, Alexei Rykov, and Lev Kamenev. He was named First Deputy Procurator General on the 30th of June 1933, then replaced Ivan Akulov in June 1935 to become the legal architect of Stalin's Great Purge.