"Why, when a cop finds a body drained of blood with two holes in the corpse's neck, isn't the first thought–the first thought–in his mind, "Oh, shit, a vampire!" Or, at the very least, "Oh, shit, some psycho who thinks he's a vampire!" I mean, it's all over our entertainment culture, you can't miss it, and for the cops not to have that thought strikes me as totally unbelievable; it kills my suspension of disbelief. Really? Has the cop never seen a TV show, a movie, a comic book, a novel? He doesn't have to believe in real vampires, but if he doesn't acknowledge it? Right away, the cop is a dunce, albeit the writer is making him such for a plot device that, for me, doesn't play any more.
Stop any ten people on the street and posit this scenario: The cops find a body in a motel, it's been drained of blood, and there are two puncture marks on the neck, over the big blood vessel. Who you think might have done it?
How many do you reckon won't say "Its a vampire!"
I haven't written a vampire story in twenty-odd years, and that one was a short and comic tale. In it, I had the vampire wearing sunblock and a Kevlar vest; at the time, these were still relatively-novel concepts. Both have been exploited a lot since, and again, it makes me wonder. If one of the few ways you can kill a vampire is with a stake through the heart, why wouldn't one with half a brain have a trauma plate over his heart to turn away stakes, arrows, or wooden bullets? A fireproof gun safe for a coffin, only able to be opened from inside? A really good watch or an iPhone app that warns them dawn is coming? Wouldn't you take such precautions? I would.
Not, nowever, if the plot device needs to have them kinda stupid. If they are that stupid or arrogant, we need to know that ..."