The Sleepy Lagoon Murder refers to the killing of a young Mexican-American man named Jose Diaz in 1942, which sparked significant racial tensions and violence in Los Angeles. This incident became a focal point in the lead-up to the Zoot Suit Riots, highlighting issues of racial discrimination, police brutality, and the social dynamics between Mexican-Americans and Anglo-Americans during World War II. The case exemplified the prejudices faced by the Chicanx community and the societal responses to their cultural expression through zoot suits.