Tom Chaney is a fictional character from the novel "True Grit," written by Charles Portis. He is portrayed as a ruthless outlaw who commits murder and theft, prompting the young protagonist, Mattie Ross, to seek revenge. Chaney's actions set the stage for the story's central conflict, as Mattie hires a U.S. Marshal to track him down. In the narrative, Tom Chaney is depicted as a cunning and dangerous man, often evading capture. His character embodies themes of justice and retribution, which are central to the plot. The pursuit of Chaney ultimately leads to significant developments for both Mattie and the lawman, Rooster Cogburn.