What event justified Malcolm X's concerns about police brutality?

Malcolm X's concerns about police brutality were significantly heightened by the 1963 assassination of civil rights leader Medgar Evers in Mississippi and the subsequent violent responses to civil rights protests. The brutal treatment of African Americans by law enforcement during these events underscored systemic racism and violence, reinforcing Malcolm's belief that the police often acted as enforcers of white supremacy. Additionally, incidents of police violence against Black communities in cities like Birmingham and Harlem exemplified the urgent need for social justice and reform.