I wonder if OG suggested She and DB meet at the Tavern to discuss their relationship one last time so things did not get our of hand. He didn't show up, bur instead slipped into her house and ambushed her. By knowing where she was...most likely having stalked her...he knew a close time frame when she would get home. I have heard sources say she let him in and those that said he used the key. On the presser, they said they weren't sure which it was. Chances are that they do know from video surveillance and we may know later