Why kill someone for a half pint of blood?! (Spoilers)
*** This contains spoilers, watch the movie before reading***
When he kills Kerry Fox, he only drinks about a half pint of blood from her. You can tell it's only a half pint or so because of the look of her body, her skin would shrivel, and her coloring would turn white and pasty. Why kill someone for that small an amount of blood? I'm sure he could have told her what he was, and she probably would have GIVEN him the blood. He could buy blood from people, bribe some hospital worker or blood bank person. Hang out in front of a blood bank and offer people twice what they get in the blood bank, knock somebody over the head and draw a pint or two, something. It just seems very stupid to kill someone for that small an amount of blood, having to clean up, getting rid of the body, deal with the cops, risking getting caught, all of that for a half pint of blood. Makes no sense.
"...nothing is left of me, each time I see her..." - Catullus