Krzysztof Raczkowski, Polish drummer and songwriter (born 1970)

Krzysztof Raczkowski, also known as Docent or Doc, was a Polish drummer, best known as a member of Polish death metal bands Vader (1988–2005) and Dies Irae. He also appeared as a guest or temporary musician in Sweet Noise, Hunter, Slashing Death, Unborn, Moon, and Overdub Trio.