Dream of murder and rape

I recently had a dream in which I felt no control over. I was in some kind of hotel and I was in the midst of murdering people. I took the life of 3 people, only one however, was specific. This one girl was blonde, slim, and seemed to be the kind of woman I tend to be attracted to. I never saw a face. After I killed her my girlfriend showed up. I was about to leave the room with her when I suddenly decided to go back to the dead woman's body. I undressed her and raped her while my girlfriend watched. For some unknown reason, the only thing she mentioned was a comment towards me, wondering why I chose "that hole". I then woke up in the middle of an orgasm (wet dream). I felt disgusting for this.

I have had one sexually traumatizing event in my life when I was 10, it was never resolved. Could this be my dreams acting out according to the event from 15 years ago? Other than that moment, I can't see any reason why I would dream about rape and murder. I am a fairly harmless man with no grudges or anger towards people in general. Anyone know why this might have occurred?

I have nothing to say about you dream, I don't know what it means, but there are two things I could say. One is that yes, if you've had traumatizing experiences, "never resolved" as you say, you may have dreams about it for decades; like war veterans with nightmares for the rest of their life. If this is one of those post-trauma dreams I don't know. The other thing I would like to mention is that everyone has disturbing dreams and while there may be a point in contemplating the contents one shouldn't carry it like a heavy load on one's shoulder and feel guilty about it - as you say, you had no control over it.