Lloyd Francis MacMahon

Who was Lloyd Francis MacMahon?

Lloyd Francis MacMahon was a United States federal judge.

Born in Elmira, New York, MacMahon received an A.B. from Cornell University in 1936 and an LL.B. from Cornell Law School in 1938. He was a U.S. Naval Reserve Lieutenant during World War II, from 1944 to 1945. He was in private practice in New York City from 1942 to 1953. He was a Chief assistant U.S. attorney of Southern District of New York from 1953 to 1955. He was the United States Attorney for the Southern District of New York in 1955. He was in private practice in New York City from 1955 to 1959. Judge MacMahon served as a chief assistant United States attorney in Manhattan from 1953 to 1957. In 1955 he successfully prosecuted the Mafia boss Frank Costello for income-tax evasion.

MacMahon was nominated by President Dwight D. Eisenhower on March 10, 1959, to a seat vacated by Lawrence E. Walsh. He was confirmed by the United States Senate on September 9, 1959, and received his commission on September 10, 1959. He served as chief judge for the United States District Court for the Southern District of New York from 1980-1982. He assumed senior status on May 31, 1982. MacMahon served in that capacity until April 8, 1989, due to his death