If John was as obedient as Luke, Walter couldn't help thinking that he might've become the chief of the Detective Bureau long ago, and Dustin wouldn't have come into the picture.
Luke didn't know about Walter's complicated feelings, and wouldn't care too much even if he did.
It was unlikely that Walter would actually fight Dustin.
If this senior inspector couldn't accept the situation, he would be transferred to another department; at the very least, he and Luke would be colleagues for a few months.
Luke could tell that Walter wasn't a mean guy. He was only competing with Dustin for a promotion, and certainly wouldn't make the captain suffer.
After Walter and Ricky left Clinton, Luke and Selina turned around and looked for the two families based on the addresses which Walter had given to them.
The questioning didn't go smoothly, and there was almost a gunfight at the second address.
