John Marley must have played his role in IN BROAD DAYLIGHT just before his most famous role of all as Jack Woltz in THE GODFATHER. As is well known, criminals always think themselves cleverer than the policemen investigating them, and that is exactly the case here: Richard Boone, portraying fairly convincingly an actor and movie director who has gone blind, catches his wife having intimacy with his best friend and decides to ice her and make the adulterous pal the culprit.
Needless to say, a blind man is bound to make more mistakes than a normal person, even one of poor eyesight, and in this instance he makes the mistake of taking his therapist's umbrella.
Suzanne Pleshette plays that therapist - a small and largely meaningless part, rather sad to watch. She helps with advice and a guide dog, but ends up compromising her client twice by speaking too much and coming back searching for her brolly.
That is where Marley proves the superior intelligence of the copper, immediately pouncing on the fact that Pleshette had lost her umbrella and linking it to the Greek fella who went into Boone's wife's hotel with the umbrella that only the porter saw. (Puzzled as to the reason for linking a missing brolly to a fellow no one could identify? So am I!)
Of course, blind Boone makes the classical mistake of returning to the scene of the crime... and catching the wrong taxi.
Passable TV entertainment that does not tax your brain cells.