The Vicario twins later tell the narrator that they began looking for Santiago Nasar at Maria Alejandrina Cervantes' place, where they had been with him until two o'clock. Since he wasn't there, they went to Clothilde Armenta's milk shop, which was near Santiago's house, to wait for him to come out.
After Angela Vicario reveals Santiago's name to her brothers, they immediately go to the pigsty. They pick out the two best knives, wrap them in rags, and have them sharpened at the meat market. Faustino Santos, a butcher, wonders why they are coming—he thought they were so drunk that they didn't know what time or what day it was. They talk about the wedding, and Pablo declares that they are going to kill Santiago Nasar. Because the twins are known to be good people, nobody pays any attention to them. After they leave, Faustino reports the conversation to a police officer who comes by.
At Clothilde Armenta's milk shop, the twins drink two bottles of cane liquor. They tell her that they are looking for Santiago to kill him. Clothilde tells her husband, Don Rogelio de la Flor, but he responds that she is being silly.
Meanwhile, the police officer informs Colonel Lazaro Aponte about the Vicario brothers' plan. The Colonel has settled so many fights the night before that he is in no hurry to settle another. The Colonel hears that Angela Vicario had been brought home on her wedding night, and realizes the connection between that event and the impending murder. The Colonel goes to Clothilde Armenta's shop, takes the knives away from the boys, and tells them to go home. He explains later that he thought the twins were bluffing.
The Vicario brothers go home, get two different knives, and go to have them sharpened. Faustino is confused, believing that the boys have brought the same knives. Although Pedro makes the decision to kill Santiago, Pablo insists on following through with the plan. Pablo Vicario's fiancée, Prudencia Cotes, says she never would have married him if he hadn't upheld his sister's honor by killing Santiago. She waits the three years he is in jail, and when he gets out he becomes her husband for life.
The twins go back to the milk shop, their knives wrapped in newspaper from Prudencia's house. Clothilde Armenta gives them rum, hoping to make them so drunk they can't do anything.