[Coroner's office: Nick and Natalie walk to her lab.]
NA: I'm gonna take another look to get a better look at what we're facing. [They walk in. Nick sees LaCroix standing there.]
N: What do you want, LaCroix?
LC: Nothing much. I just thought that now, at the hour of our death, the good Doctor might appreciate seeing first hand, the results of her hypocracy. You want to help people, Doctor. You proffer modern medicine as religion. And that faith and technology will not be defeated. It's a false promiss. A lie. You can't save your friend. You can't save us. You are powerless.
NA: [stepping up to him] Why are you so angry? You're not sick.
N: [realization dawning] But you were sick, LaCroix. What happened?
LC: A look into that abyss, Nicholas. I have faced Death this night, and I have called his bluff. [He uncovers Calvin's body.]
NA: [horrified] You killed him. You drank his blood?
LC: Yes. A reward for the plague he visited on my house.
NA:[realization dawning] Oh my God. Oh my God, that's the answer. Cal said it in the precinct. HIV overwhelms it in the body.
LC: So, the killer is the cure. Isn't that fascinating. His tainted
blood will be out salvation.