In chapter 13 of 'A Separate Peace' Why does Gene conclude that none of the Devon boys ever accused him of being responsible for what had happen to finny?

Gene concludes that none of the Devon boys ever accused him of being responsible for what happened to Finny because they likely did not want to confront the truth and were also complicit in their own ways. Additionally, they may have felt guilty for their roles in the events surrounding Finny's injury and death, so they chose not to point fingers at Gene.