Around 1740, somewhere in Western Prussia, a number of members of the Wollschläger family, died one after the other in a short period of time.
One of the deceased was suspected of being a vampire so the family gathered to decide on what action should be taken. It was decided to decapitate the corpse of the suspected vampire.
A nephew of the vampire volunteered to do what had to be done. After he had chopped off the head of the corpse, he collected some of its blood in a glass.
The family members all had to drink a little bit of this horrible fluid as a medicine against the vampire disease and the corpse was reburied inside the Wollschläger family crypt in the Monastery of Jakobsdorf [with its head between its legs].
The case was mentioned in “Vampires, Burial & Death” by Paul Barber in 1988.
The author mentions an article written by Leo Gerschke in 1962, with the title “Vom Vampirglauben im alten WestPreussen” describing a trip to the monastery. Supposedly he even saw the skeleton on display.