[rwt60]

I'm just throwing out ideas. One seems as good as another at this point. Too much of this doen't make sense. If I were the police, I think I would at least stop by the milkman's home for an interview. He frequented the neighborhood, so that gives him some possible connection.

[Iwo Jima]

I can think of no reason why the police wouldn't interview the milkman. Even if they are absolutely sure that they know who did it and it is not him. You would think that they would want to 1) continue the rouse of pretending to investigate, and 2) see if he really did see something.