The Deadly Game (1954)
The Scientist: [after Phil takes the microfilm out of the scientist's raincoat] But good gracious, do you mean to say that's been in my pocket all that time? Why give it to me yesterday and take it back today?
Philip Graham: Cause I felt sorry for you. You seemed to be in a tight spot.
The Scientist: Why don't you let me have it today?
Philip Graham: Because I'm in a tight spot now. I think the police suspect that I killed Tony Roscoe.
The Scientist: But what use are the microfilms to you?
Philip Graham: Gonna use them as bait. Maybe I can catch the fellow that's behind all this.