I'll admit to being somewhat influenced by having just read Betty Broderick's autobiography and then re-read books about that case. In that case, like this, there is a scorned woman and tragedy. But in the Broderick case, there are back stories, not justification, but circumstances that were stepping stones to those murders.
Here a beautiful, accomplished young woman, much loved by so many is dead. There is a successful young doctor who was dating her. Do we know much more than his educational background and how he looks in pictures about him? I don't think we do at this point. He has hardly been spoken about.
There is another beautiful young woman. We know his Mother supposedly said she was crazy. We suspect she was involved in a horrific crime. But what do we really know about her relationship with "Ricky?" We know hardly anything about her...and what we DO know is tainted by the horror of what we suspect she did.
Her FB is down now and I regret that because that offered insights no longer available.
I think there is a lot more to be revealed about this triangle. Nothing will justify the murder. But we may learn things that enhance our understandings of the motivations. There may be many more dimensions than we have knowledge of at this point.