Paul Carpenter

Culver is a psychiatrist who uses hypnotism to treat his patients. When Carpenter, a test pilot, comes to see him complaining of blackouts that make his job difficult, Culver tries to mesmerise him into killing his wife.

A famed trumpet player is suspected of murdering a blues singer. Using only two minor clues, he narrows the suspects to four people, but only after surviving poison placed on the mouthpiece of his trumpet!