Go to about 37 seconds in on this video for a picture of DH:
http://www.ncwanted.com/unsolved/video/7331581/
I've been thinking about a couple of things. First, I just don't think it sounds like your "normal" rapist to come into a random house in the middle of a street, konk some obviously helpless woman on the back of the head, rape her and leave. That is leave with only that as your motive. And if it involved drugs - that's always about money. This person would "normally" have taken something of value (cash, credit cards, jewelry, etc.) The other thing that I'm thinking is about the sister DH. If I was close with sisters in a way that meant I could care for them when they needed it - I sure would be horribly upset over the condition I found them in. I would not even consider for a minute discussing with anyone the possibilty of me being cleared by the police. I would be outraged at the very notion and determined to find out who was responsible. And let's not forget how freaked out I would be thinking that possibly someone was still in the house or that my negligence in anyway was the reason my sister was hurt or dead. I feel like DH is hiding something.