I never fully explain why the Kid that was Kidnapped and Torture was Alex Curtis and not a rich kid was because Alex's father Darrel Curtis Testify against Dick Aaron (Jamie Aaron's father) which put him away for eight years. Dick Aaron knew Darrel Curtis Twins. So Dick Aaron's revenge was to him pay and in Dick Aaron's sick mind he though it be easier to take Darrel Curtis nine year daughter Alex instead of his son Darry.
So Sorry for the Confusion