DesertCookie,
I agree with a lot of what you said. Over and over, police say 'no cause for alarm in the neighborhood'. I agree that affair makes sense, but I think the BF spent the night and got enraged about something or other - all that is mystery right now. Maybe the BF uses some sort of drugs? I think her BF got furious at her over something, and she 'pushed ALL his buttons'. I bet the guy had noticed the hammer, and that it was close by (not on purpose) when BF went emotional-KaBoom on her. I look forward to learning who the guy is, and learning about his history. I also think it was a long term relationship.
With DNA and all those tricks, maybe it'll be quite that police make an arrest, or announcement if BF is hiding (like Wash DC Wint).
I also think the BF would not leave and commit suicide - I think because the press is saying the police say it is a very brutal scene, which makes me think there was some 'running around' the home (leaving bloody trails, blood on wall for instance from this lady/mom/dr. trying to escape her BF. Something about this case tells me BF will wind up arrested and charged, and police already know who it is --- unless BF is 'missing' now, for sure police are tailing his every move now, and will do so right up to when the pros' charges the BF and police go cuff BF and put him in the local Cross Bar Motel.
One more note: I bet BF winds up with a murder trial, 2nd degree, in this case. BF/BF's attorney can make all sorts of claims to try to get those 12 jurors to believe this whole thing was just heat of the moment, and that it is the murdered lady/mom/dr. who caused all the problems - BF will say 'Lady/mom/dr. attacked poor me.........