After the war, Stamos received an
LL.B. from
DePaul University College of Law in 1948, and was admitted to the
Illinois Bar in 1949. He then served as assistant corporation counsel for the city of Chicago, assistant state's attorney for Cook County, and chief of the Criminal Division of the Cook County state's attorney office. In 1966, Stamos, then the first assistant state's attorney, was appointed
Cook County State's Attorney after predecessor
Dan Ward was appointed to the Illinois Supreme Court. While Stamos was in this office, Cook County tried mass murderer
Richard Speck, although Stamos did not consider prosecuting the case personally. Stamos was not slated for reelection to the job in 1968, as Mayor
Richard J. Daley feared losing the office to a Republican candidate of Irish ancestry, Robert J. O'Rourke, and instead slated
Edward Hanrahan, who went on to win the election. As he was not slated to run for his position as a prosecutor in 1968, Stamos instead successfully sought election to the first district appellate court in that year. He served in that position until his appointment to the Illinois supreme court in 1988, to fill the vacancy created by the retirement of
Seymour Simon. Once, while serving, he received a letter from a fan of the actor,
John Stamos, asking for a picture. He replied by sending a photograph of himself in his judicial robes. ==Personal life==