John Devereaux is a fictional character from the 1990 film "The Last of the Finest." He is portrayed as a dedicated police officer who becomes disillusioned with the corruption within the police force. His character embodies themes of justice and moral integrity as he navigates the challenges of his profession. In the film, Devereaux and his team investigate a drug operation that leads them to confront powerful adversaries. The story highlights the struggles of law enforcement in dealing with crime and corruption, making Devereaux a symbol of the fight for justice in a flawed system.