This is an absolutely delicious episode mixing so many different aspects of criminal and human behavior on both sides of the law. While one can feel for the grand daughter of the two murder victims (and yes, both are murder victims), taking it out on someone two generations later really isn't fair. It is also really interesting to see where the family members ended up, so many years later.
I found the episode very interesting and exciting all the way to the end. The one thing missing, though, it would have been too much (I fear) is a more film noir quality to the episode, though, the flashbacks do remind one of that style, but moving it into some of the present day might have been nice (and maybe a visual clue for those looking). All this is hindsight and not even 20/20 hindsight, so it is what it is a really great way to spend an hour (or an hour minus commercials when viewing from a DVD or Blu-Ray disc).