No circuit overseers in the 1930s.
I interviewed an old-time Witness for Uncle B's research. She reported that in the mid-1940s, the "Company Servant" in Salinas, California, ran away with a 15 year old girl. But things like that do not mean they didn't expel from the congregation. As I understand it, because 'trials' were very public, many congregations were reluctant to tread that path. If you want to see what open congregation trials were like find the Golden Age report on Rutherford expelling the Canadian Branch Servant. I've forgotten the exact date, though I believe it was between 1935-1937.
The Watchtower in the 1920s-1930s had repeated warnings about behavior. One of the most interesting to me was a 1924 article on strong personal differences.