I also recall that.
Have to keep in mind, there's another facet of this case that we aren't allowed to mention. Much more evidence that will never be heard. And that's about as much as I'm allowed to say. Kind of wish I could call up AC, because there's a side that I don't believe was ever investigated, and never will be.
I agree, how could DR not be a target, for the reasons you stated, and just the fact that she would be in the house with HR. If the Ws drove to DR's and she wasn't home, why wait if DR wasn't targeted? AC said they waited for DR to come home.