 He searches for Simon with the intent to kill him, but just as he finds him, Nest intervenes.On the way out of town, she realized that Stefanie is actually the demon, because of parallels between Stefanie's actions and those of Nest's father (also a demon), not to mention the timing issues and other evidence that lead her to this truth.John realizes that he's been subtly led toward the Void ever since Stefanie came into his life, after San Sobel; as a shape-shifting demon, Stefanie forged documents to support the embezzlement accusations, attacked Nest and her friends in the park, set fire to the shelter to explain the wounds she'd sustained trying to kill Nest, lied about John being fired, and morphed into Simon at the museum so John would be tricked into killing the real, innocent Simon and completing his turn to the Void.