The milkman saw the driver of the green car tailing him and thought that he trying to pilfer dairy goods (evidently that is something of a problem). So the milkman tried to talk to him, just to sort of let him know that he was on to him, I gather. But the guy refused to look at him and acted real strange.
I heard the milkman, Charlie Miller, on a previous interview. He gave a totally different description of the man in the car cruising the avenues. He said he was smaller than Edmunds, and was wearing a white cap and plaid shirt. Charlie seems to be a nice chap. Yes, he did mention that he used to give out little treats to the neighbor children. That's just a good business tactic to attract customers. Nothing suspicious there.
I don't believe for a minute that Edmunds is a real suspect. Something else is going on here.