I think and this is just my thoughts, that LE have a good idea who did this. Or at least they think they know. But without proof, without evidence, or a witness, you can't arrest them. This was no stranger to her, unless it was Keyes the dead serial killer, that is the only killer I know that had an M.O. like this, but there is no proof he was in the area at the time. So it was someone that knew her, well enough to know she was home from a trip, where her car was, how to enter her home, or she knew them so well, she opened the door. I think they know, or at least have it down to 1 or 2 people in her circle. People talk, they brag, they get drunk, they get divorced, or breakup with others and then one day, someone talks. Some time they keep it for when they need it, like a get a reduced sentence if I tell what my friend or husband did. Let's pray for that.