Measure for Murder - Clifford Witting

The novel is in two sections. In the first, the narrator, Vaughn Tudor, describes the formation of the small amateur theatre group, in a sleepy village on the South Coast in the period leading up to the Second World War. But then in the second half, after the revelation of the identity of the victim and the calling in of Witting''s series detective Inspector Charlton to investigate, the reader finds out that there were rather a lot of people who had cause to visit that little theatre on the night of the murder...