How do the children escape One-Eyed Jack in the novel, This Tender Land?

When Odie gets curious about Jack's mysterious life and circumstances, he begins snooping each of Jack's rooms. He discovers one particular bedroom that disturbs him, torn apart in a seemingly violent fit. When the friends grow increasingly distrustful of Jack, an angry and unpredictable drunk, they devise a plan to escape. One night while Jack is drinking, he grows forceful with the children; Odie shoots him and the friends flee.