The Question and Answer section for The Adventures of Huckleberry Finn is a great resource to ask questions, find answers, and discuss the novel.
First, I need to know exactly where you are in the text. Second, please clarify what you mean by sadism.
Without knowing an exact chapter, the answer to this question might vary.
In Chapter Five, Pap is put in jail for a week.
In Chapter Nine, we learn that Pap is dead.
I'm sorry, in order to answer your question, I will need you to provide the text in question.