Peter Plogojowitz (died 1725) was a Serbian peasant who was believed to have become a vampire after his death and to have killed nine of his fellow villagers. The case was one of the earliest, most sensational and most well documented cases of vampire hysteria. It was described in the report of Imperial Provisor Frombald, an official of the Austrian administration, who witnessed the staking of Plogojowitz.

The case

Peter Plogojowitz lived in a village named Kisilova (possibly the modern Kisiljevo), in the part of Serbia that temporarily passed from Ottoman into Austrian hands after the Treaty of Passarowitz (1718) and was ceded back to the Ottomans with the Treaty of Belgrade (1739) (see Arnold Paole - Background for more details on the historical context). Plogojowitz died in 1725, and his death was followed by a spate of other sudden deaths (after very short maladies, reportedly of about 24 hours each). Within eight days, nine persons perished. On their death-beds, the victims allegedly claimed to have been throttled by Plogojowitz at night. Furthermore, Plogojowitz's wife stated that he had visited her and asked her for his opanci (shoes); she then moved to another village. In other legends, it is said that Plogojowitz came back to his house demanding food from his son and, when the son refused, Plogojowitz brutally murdered him. The villagers decided to disinter the body and examine it for signs of vampirism, such as growing hair, beard and nails, and the absence of decomposition.

http://theunexplainedmysteries.com/Vampire-Peter-Plogojowitz.html