Then again, there may have been deep involvement. I must wonder, were either or both in any way involved with anti American / anti War / Islamoappeasment protests or groups?
You said — “Then again, there may have been deep involvement.”
There had to be some involvement, or else she would have been arguing with a stranger. Most likely they went out a few times, as girls will do on campus — to different functions or whatever. He probably wanted to take it up a notch and she figured out that he wasn’t the right one. If she said something like, “I think we should quit seeing each other.” — then that might have been the argument that happened earlier. He came back later and then shot her.
Regards,
Star Traveler