I just got through watching "Dial M for Murder" (1954), and John Williams plays an excellent sleuth.
He even utters the "Oh just one more thing sir" line a few times himself. It's an engrossing film with a strange conclusion, but I suppose that's what Hitchcock had in mind.
Interesting to note that the movie also stars Ray Milland, and that both actors appear in Columbo episodes in the 2nd season.
Re: Chief Inspector Hubbard to Sir Roger Haversham
she definitely would have david! but the only problem would be that i would be so enraptured by how beautiful and elegant she was and i would miss the whole plot!!