A police officer walks down the street and see's a man as he lights his cigar.
Old friends walking
We should go get a bite to eat pal.
The police officer walks by and a little time later a man walks up to the man at the steps.
Hey you are not Jimmy!
The man on the steps realizes that this man is the man he has been waiting for, an old friend from 20 years ago.
Bob, I was at the appointed place on time. When you struck the match to light your cigar I saw it was the face of the man wanted in Chicago. Some how I couldn't do it myself, so I went around and got a plain clothes man to do the job. Jimmy,
The to friends walk down the street as the talk.
Bob then realizes that his thought to be his friend is not his friend as the man hands him a note.