via @gsanroman2.bsky.social
Plummer served as a longtime superintendent of Fullerton High School and Fullerton College. According to a membership list gone missing from the Library of Congress, he also belonged to the KKK in Orange County during the 1920s.
https://www.latimes.com/socal/daily-pilot/entertainment/story/2025-05-08/louis-plummer-home-fullerton