premise: Richard Fortus is a guitarist of Guns N' Roses.
hypothesis: Guns N' Roses . The current lineup consists of Rose , Slash , McKagan , Reed , guitarist Richard Fortus , drummer Frank Ferrer and keyboardist Melissa Reese . Richard Fortus ( born November 17 , 1966 ) is an American guitarist . He is best known as a member of the hard rock band Guns N ' Roses , with whom he has been a member since 2002 , and with whom he has recorded one studio album .