The Vampire Bat (1933)
Horror film about mysterious deaths occurring in a small European village. The victims are all found with two puncture marks on their necks and are drained of their blood. Rumors of vampires spread through the village while the local constable tries to find clues to solve the murders, which he suspects are the work of a homicidal lunatic. The plot has a couple of unexplained holes in it, which occur later in the film, but they don't ruin the film as far as horror flicks go.