Another scenario is that BC may have finally gotten involved with someone who would not take no for an answer, who wouldn't let MC ultimately keep her.
I wonder about this too. BC had been home on medical leave for quite some time. I would imagine that any regular visits with others might have been severely curtailed during that time.
Lot of time for someone to get really angry about plans being disrupted. May have seen MC as the one responsible, and taken matters into their own hands.
The timing seems really significant. She had just returned to work.
Just want to add a thought of a different scenario. Wondering if it could have been someone she was not involved with, but who wished he could be. Again, viewing MC as the obstacle to that.
Nurses see people at their most vulnerable times. She did Home Health. Probably had long-term patients and provided personal care for both genders.
No matter how careful a nurse is to set boundaries while providing care, ( much of it intimate with changing dressings, checking and inserting tubes, etc, ) there are patients who suddenly see you in a new light.
In short, they 'fall in love' with you within days. Nurses learn quickly how to handle those situations, but some of them can get a little weird.
BC probably ran into a few too. Perhaps one of them saw MC as the roadblock to their happy future. Even if BC didn't know she was supposed to be part of it.
I hope they're checking out all of her patients as well, present and past...
JMO