Based on the Anthony Hopkins version that appeared in Coppola's '92 Dracula movie.

Abraham Van Helsing was a dutch doctor and priest who killed vampires and other monsters, often using crosses, garlic or whatever these old legends want you to kill vampires with. Without Van Helsing, we would still have vampires hunting us every night.

He was put into an asylum after impaling a kid dressing up like Dracula during halloween.