wrong blood type
I thought at first the reason the real nicole was given the wrong type of blood was because the person she was impersonating had been a patient there before and was already on file as having that type. That would have made it interesting, as she would have felt more responsible for her death.
And on a side close, when i thought about it later it kinda creeped me out he was hitting on his half sister--although not knowing that's who she was.
"Well, for once the rich white man is in control!" C. M. Burns