In holes what does zero realize about the suitcase while in the hole?

In "Holes," Zero realizes that the suitcase he finds in the hole is not just any ordinary suitcase; it belonged to the outlaw Kissin' Kate Barlow and contains a significant treasure. This revelation connects the past to the present, highlighting the history of the land and the characters’ struggles. His discovery symbolizes hope and the possibility of redemption, as it offers a way to change their fortunes. This moment underscores the themes of fate and the intertwining of past and present in the story.