"The Next Witness" is a Nero Wolfe mystery novella by Rex Stout, first published as "The Last Witness" in the May 1955 issue of The American Magazine. It first appeared in book form in the short-story collection Three Witnesses, published by the Viking Press in 1956.

Three Witnesses is a collection of Nero Wolfe mystery novellas by Rex Stout, published by the Viking Press in 1956 and itself collected in the omnibus volume Royal Flush. The book contains three stories that first appeared in The American Magazine:"The Next Witness" "When a Man Murders" "Die Like a Dog"