Lacy was the son of Cecil "Jack" Baker and Lura Elizabeth Byram Lacy. He moved with his family to Birmingham in 1928 and graduated from Woodlawn High School in 1939. He went on the University of Alabama, earning a bachelor's in chemistry in 1943 and then entered the Midshipmen School at the University of Notre Dame. After graduating in 1944 he was sent to the South Pacific, returning in 1946.
After returning, Lacy enrolled at the University of Alabama School of Law, but transferred to the University of Virginia before graduating in 1949. He returned to Birmingham to begin his career as an associate in the firm of Bradley, Arant, All & Rose.
In 1954 Lacy became a staff attorney for the Alabama Gas Corporation and later took on the roles of assistant secretary and vice president for the company, where he remained until 1986 when he partnered with fellow attorney and longtime friend J. Vernon Patrick in private practice, retiring in 1996.
Lacy was a major supporter of Birmingham's civic institutions. He serves as president and chairman of the board for the Birmingham Symphony Association from 1964 to 1967, helping establish a $1.5 million trust to fund the orchestra. In 1965 he was elected the first chairman of the Civic Center Authority of the Cities and County of Jefferson County which developed the Birmingham-Jefferson Civic Center. Lacy headed the delegation that announced the national architectural competition to design the new facility.
Lacy died in 2010.
- "Alexander Shelton Lacy" obituary (February 6, 2010) The Birmingham News