Juvencio thinks of what he did as "that old business." From this phrase it can be inferred that he

From this phrase, it can be inferred that Juvencio feels no regret or remorse for his actions. This also shows us that he does not regret Don Lupe's murder.

Explanation:

In the story, Juvencio stated he had to kill Don Lupe cause he saw the killing as a deed as morally justifiable and necessary, and that he had no choice. Juvencio implies that the murder happened thirty-five years ago and that any reason to frame him for the murder has been buried long ago with Lupe's death. The murder was due to the result of Don Lupe not letting Juvencio pasture his animals on the land that he (Done Lupe) owned. Because of this Juvencio's animals began to die and so he created a hole in Lupe's fence to gaze around animals. Lupe killed one of his animals after coming to know about the fact that these animals were gazing in his land and hence Juvencio killed Don Lupe.