Jmo in many cases I have followed here, which is lots...that term seems to get assigned by posters to any man who kils his wife or girlfriend...and once in a while, vice versa...
Well, I'm going to take a shot at this. I'm 10 pages behind in reading this thread, but what the heck. I've explained this in a previous thread.
Firstly, I doubt he has officially been diagnosed as a narc, but probably should be

Those of us that have experienced the narcissistic personality recognize the behaviours they exhibit. It's a "cluster" of behaviours. PF employs some of these behaviours. Narcs come in "varieties" if you will. Not all narcs are murderers. Most are not. And, not all murderers are narcs. It depends on the situation they are trying to control, IMHO.
It's often hard to understand the "why", in why lovely people get involved with these deranged misfits if you don't understand the narc. Thye are the devil in disguise, master deceivers, even if they don't kill you. Unfortunately, this is not such a case. I suspect PF "love bombed" KB initially. Attentive, kind, gentle "loving". Difficult to resist such attention and "love". Lots of affection and promises. Narcs move quick, like PF did. Move her down there asap. They like their victims to be isolated from family and friends either by miles or socially. KB was also isolated from coworkers. Regrettably, she got pregnant. I've said before, and I don't like saying it, but baby K will be a comfort for KB's family, but she is likely the reason PF killed her. If there were no baby, there wouldn't be a need to kill her for custody and ultimate control.
All the initial affection takes a while to wear off. The victim begins to see through the cracks, the promises are hollow, as I'm sure KB began to realize, but the victim continues to think they can make it work, somehow. Some victims are empaths. I won't even start on that now because I don't think Kelsey was. But, as time goes on, the victim realizes there is no "knight in shining armour", just armour. Reality sets in. He's no longer on the pedestal she created for him during the love bombing. The mask has dropped and she sees him for what he is, and isn't. The narc feels this slight and he doesn't like it. Rejection. So, they cheat. Find another victim and love bomb them. Back on the pedestal where he needs to be. Same cycle. But now, he's got two on the go, one who adores him and one who sees him for what he is but is hanging on, still trying to make it work. But he doesn't want her anymore, she doesn't stroke his EGO, so he plans his escape. Create some "flying monkeys". Tell others "what she's really like", takes off, has mental health issues, isn't interested in getting married, OR, btw we broke up last New Year's, or was that TG? The lies he is telling others are projecting his own bad character and behaviours onto the victim. PF did this well just before he murdered her, to put himself in a positive light. Self preservation for a narc. You see this in those defending him. They really don't KNOW him.
I could go on, but there is so much info out there if people really want to understand the different narcissistic traits inherent in the disorder, you just need to read on-line or even listen to some Youtube videos by professionals on narcissism. I'm done
