I can't help it. In many ways I am a very very little spiteful petty man. For whatever reason, it sticks in my craw that a violent felon who spent his life involved in crime is leaving his family with far more wealth than I will be able to after a lifetime of scrupulous saving.
Save your annoyance for the little shits who are responsible for this situation. IMO putting those people in a room full of other people whom they've abused (does anyone honestly think that this was a one-time thing for these officers?), for similar reasons and "what goes on in that room stays in that room" might go some way to discourage other officers from thinking that that their job entitles them to be the worst examples of how to behave.
It doesn't bother me in the slightest that the family has just been handed a pile of cash that's probably an order of magnitude more than I will ever manage to save in one go. If I remember correctly, you have children, and I'm pretty sure that you wouldn't accept $6M in exchange for one of them to be brutally murdered.