Was the $40k already scheduled or part of the plan/operation?
I would be surprised the $40k was intercepted by this crew. I think they masterminded the $40k take, forcing the father to request it be delivered. I say publicly torture them all, then wait a bit, then burn them all dead like the evil vermin they are.
Perhaps he demanded money, and the family arranged to get him some, in hopes that he would let them go...