Vampires - Atomic structure

"That's right," Ivan said. "They don't." He leant across the table, as though to tell me a secret. "But those two aren't entirely normal, Darren, as I'm sure you already know. March disappeared like a magician, while Crepsley …" He coughed. "Well, we haven't been able to photograph him."

I smiled when he said that, and looked up at the video cameras. Full-vampires have peculiar atoms, which make it impossible for them to be captured on film. The police could take snaps of Mr Crepsley from every angle they could dream of, with the best cameras available — to no visible effect.

***

Cirque Du Freak: Killers of the Dawn, Chapter 5