Carcer
The villain of Night Watch, described by Vimes as "a stone-cold killer. With brains".
Carcer is said to have a talent for unnerving people, an annoying laugh and a perpetual conviction of his own innocence, despite his many crimes, including at least two murders. He claims his original crime was stealing a loaf of bread, though Vimes says that Carcer's style would be to murder the baker and steal the whole bakery.
Carcer's full name was shown in a preview of Night Watch to be Carcer Dun, but this was never revealed in the completed book. His first name is also a Latin word meaning "prison."
Carcer is captured by Vimes at the end of Night Watch.
Read more about this topic: Discworld Characters