My ex was possessive, insecure, stalked me, stalked me by proxy, threw huge fits when I tried to break up, constantly messaged me. and in the end when I finally ended up having the strength to break it off, got really furious. I'm still scared of being stalked. and she is female, so I think it's really important for people to realize that women can be aggressors too, against men and other women. (I don't want to compare my ex to JA though, I mean she isn't a murderer, but she made me uncomfortable and took a chunk of my life and energy and I believe emotionally abused me on top of the stalking.)
I think this DV expert, I hope not to demean her judgment, but she's been manipulated by someone she would have instant sympathy for (a young woman who has allegedly been battered.) That, and the appeal of appearing in a high profile case, but still, I think her sincerity's been taken advantage of here, and even the defense knows it.