Alonzo Harris is a fictional character from the 2001 film Training Day, portrayed by actor Denzel Washington. He is a corrupt LAPD narcotics officer who manipulates and intimidates others to maintain his power and control over the drug trade in Los Angeles. His character is known for his charismatic yet dangerous demeanor. In the film, Alonzo serves as a mentor to rookie officer Jake Hoyt, played by Ethan Hawke. Throughout the day, Alonzo's morally ambiguous actions challenge Jake's beliefs about law enforcement and ethics. The film explores themes of corruption, loyalty, and the complexities of good versus evil within the police force.