The problem, Doctor Tam, is telling the difference between people who call themselves vampires, who are in fact model citizens with unique nutritional needs, and vampires who are only safe when they're not drinking. [And who may or may not be the spawn of the Devil, she's still not sure on that one. She's also not sure how much she wants to say about Mitchell, so she hesitates before continuing.]

If a man called John Mitchell comes in asking for blood, don't give it to him. He's about so tall [gestures about a head taller than her 5 foot self], long black hair, doesn't reflect in mirrors.