Jack Ruby was born Jacob Leon Rubenstein on March 25, 1911, in the Maxwell Street area of Chicago, the son of Joseph Rubenstein and Fannie Turek Rutkowski (or Rokowsky), both Polish-born Orthodox Jews from Sokołów. Ruby was the fifth of his parents' 10 surviving children. While he was growing up, his parents were often violent towards each other and frequently separated; Ruby's mother was eventually committed to a mental hospital. His troubled childhood and adolescence were marked by juvenile delinquency with time being spent in foster homes. At age 11 in 1922, he was arrested for truancy. Ruby eventually skipped school so often that he had to spend time at the Institute for Juvenile Research. Still a young man, he sold horse-racing tip sheets and various novelties, then acted as a business agent for a local refuse collectors union that later became part of the International Brotherhood of Teamsters (IBT).